Merge pull request #1336 from carsonmcdonald/warnfix3

More unsigned signed warning fixes

src/codegen.c

@@ -59,7 +59,7 @@ typedef struct scope {
   int icapa;
 
   mrb_irep *irep;
-  int pcapa;
+  size_t pcapa;
   int scapa;
 
   int nlocals;
@@ -2505,7 +2505,8 @@ codedump(mrb_state *mrb, int n)
 {
 #ifdef ENABLE_STDIO
   mrb_irep *irep = mrb->irep[n];
-  int i, ai;
+  uint32_t i;
+  int ai;
   mrb_code c;
 
   if (!irep) return;

src/dump.c

@@ -364,13 +364,13 @@ write_lineno_record(mrb_state *mrb, mrb_irep *irep, uint8_t* bin)
 }
 
 static int
-mrb_write_section_lineno(mrb_state *mrb, int start_index, uint8_t *bin)
+mrb_write_section_lineno(mrb_state *mrb, size_t start_index, uint8_t *bin)
 {
-  int irep_no;
+  size_t irep_no;
   uint32_t section_size = 0, rlen = 0; /* size of irep record */
   uint8_t *cur = bin;
 
-  if (mrb == NULL || start_index < 0 || start_index >= mrb->irep_len || bin == NULL) {
+  if (mrb == NULL || start_index >= mrb->irep_len || bin == NULL) {
     return MRB_DUMP_INVALID_ARGUMENT;
   }