protobuf-c/: gratuitous style changes

dave's original style drives me crazy. reformat the C code in
protobuf-c/ with "indent -kr -i8" and manually reflow for readability.

try to fit most lines in 80 columns, but due to the lengthy type and
function names in protobuf-c, enforcing an 80 column rule would result
in a lot of cramped statements, so try to fit lines in up to 100 columns
if it would improve readability. (e.g., one <=100 column line is
probably better than 3-4 <=80 column lines.)

ultimately i'd like to adopt most of the recommendations in the linux
coding style: https://www.kernel.org/doc/Documentation/CodingStyle.
this commit gets us most of the kernel indentation and comment coding
style recommendations. later commits will tackle style recommendations
that require more intrusive changes: breaking up large functions,
replacing macros that affect control flow (e.g., DO_ALLOC). this will
hopefully facilitate review and make the code base easier to maintain.

i ran the old and new versions of protobuf-c.c through something like:

  gcc -S -D__PRETTY_FUNCTION__=0 -D__FILE__=0 -D__LINE__=0 -Wall -O0 \
    -o protobuf-c.S -c protobuf-c.c

and reviewed the diffs of the assembly output to spot any functions that
changed, and went back to make sure that any differences were
functionally equivalent.

protobuf-c/protobuf-c-private.h

@@ -28,11 +28,16 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-/* A little enum helper macro:  this will ensure that your
-   enum's size is sizeof(int).  In protobuf, it need not
-   be larger than 32-bits.
 
-   This is written assuming it is appended to a list w/o a tail comma. */
+#define PROTOBUF_C_SERVICE_DESCRIPTOR_MAGIC	0x14159bc3
+#define PROTOBUF_C_MESSAGE_DESCRIPTOR_MAGIC	0x28aaeef9
+#define PROTOBUF_C_ENUM_DESCRIPTOR_MAGIC	0x114315af
+
+/*
+ * A little enum helper macro: this will ensure that your enum's size is
+ * sizeof(int). In protobuf, it need not be larger than 32-bits. This is
+ * written assuming it is appended to a list w/o a tail comma.
+ */
 #ifndef _PROTOBUF_C_FORCE_ENUM_TO_BE_INT_SIZE
  #define _PROTOBUF_C_FORCE_ENUM_TO_BE_INT_SIZE(enum_name) \
   , _##enum_name##_IS_INT_SIZE = INT_MAX
@@ -40,55 +45,60 @@
 
 /* === needs to be declared for the PROTOBUF_C_BUFFER_SIMPLE_INIT macro === */
 
-void protobuf_c_buffer_simple_append (ProtobufCBuffer *buffer,
+void
+protobuf_c_buffer_simple_append(
+	ProtobufCBuffer *buffer,
 	size_t len,
 	const unsigned char *data);
 
 /* === stuff which needs to be declared for use in the generated code === */
 
-struct _ProtobufCEnumValueIndex
-{
+struct _ProtobufCEnumValueIndex {
 	const char	*name;
 	unsigned	index; /* into values[] array */
 };
 
-/* IntRange: helper structure for optimizing
-     int => index lookups
-   in the case where the keys are mostly consecutive values,
-   as they presumably are for enums and fields.
-
-   The data structures assumes that the values in the original
-   array are sorted */
-struct _ProtobufCIntRange
-{
+/*
+ * IntRange: helper structure for optimizing int => index lookups in the case
+ * where the keys are mostly consecutive values, as they presumably are for
+ * enums and fields.
+ *
+ * The data structures assumes that the values in the original array are
+ * sorted.
+ */
+struct _ProtobufCIntRange {
 	int		start_value;
 	unsigned	orig_index;
-  /* NOTE: the number of values in the range can
-     be inferred by looking at the next element's orig_index.
-     a dummy element is added to make this simple */
+	/*
+	 * NOTE: the number of values in the range can be inferred by looking
+	 * at the next element's orig_index. A dummy element is added to make
+	 * this simple.
+	 */
 };
 
-
 /* === declared for exposition on ProtobufCIntRange === */
-/* note: ranges must have an extra sentinel IntRange at the end whose
-   orig_index is set to the number of actual values in the original array */
-/* returns -1 if no orig_index found */
-int protobuf_c_int_ranges_lookup (unsigned n_ranges,
-                                  ProtobufCIntRange *ranges);
 
-#define PROTOBUF_C_SERVICE_DESCRIPTOR_MAGIC  0x14159bc3
-#define PROTOBUF_C_MESSAGE_DESCRIPTOR_MAGIC  0x28aaeef9
-#define PROTOBUF_C_ENUM_DESCRIPTOR_MAGIC     0x114315af
+/*
+ * Note: ranges must have an extra sentinel IntRange at the end whose
+ * orig_index is set to the number of actual values in the original array.
+ * Returns -1 if no orig_index found.
+ */
+int
+protobuf_c_int_ranges_lookup(unsigned n_ranges, ProtobufCIntRange *ranges);
 
 /* === behind the scenes on the generated service's __init functions */
-typedef void (*ProtobufCServiceDestroy) (ProtobufCService *service);
+
+typedef void (*ProtobufCServiceDestroy)(ProtobufCService *);
+
 void
-protobuf_c_service_generated_init (ProtobufCService *service,
+protobuf_c_service_generated_init(
+	ProtobufCService *service,
 	const ProtobufCServiceDescriptor *descriptor,
 	ProtobufCServiceDestroy destroy);
 
 void 
-protobuf_c_service_invoke_internal(ProtobufCService *service,
+protobuf_c_service_invoke_internal(
+	ProtobufCService *service,
 	unsigned method_index,
 	const ProtobufCMessage *input,
 	ProtobufCClosure closure,