'mrb_sym' used as 'uint32_t'. it's broken portability; based on the work from...

'mrb_sym' used as 'uint32_t'. it's broken portability; based on the work from @crimsonwoods; close #216

src/class.c

@@ -17,8 +17,8 @@
 
 #include "mruby/khash.h"
 
-KHASH_MAP_INIT_INT(mt, struct RProc*);
-KHASH_MAP_INIT_INT(iv, mrb_value);
+KHASH_INIT(mt, mrb_sym, struct RProc*, 1, kh_int_hash_func, kh_int_hash_equal)
+KHASH_INIT(iv, mrb_sym, mrb_value, 1, kh_int_hash_func, kh_int_hash_equal)
 
 typedef struct fc_result {
     mrb_sym name;

src/kernel.c

@@ -39,8 +39,8 @@ typedef enum {
 #include "regint.h"
 #endif
 
-KHASH_MAP_INIT_INT(mt, struct RProc*);
-KHASH_MAP_INIT_INT(iv, mrb_value);
+KHASH_INIT(mt, mrb_sym, struct RProc*, 1, kh_int_hash_func, kh_int_hash_equal)
+KHASH_INIT(iv, mrb_sym, mrb_value, 1, kh_int_hash_func, kh_int_hash_equal)
 
 #ifndef FALSE
 #define FALSE   0

src/variable.c

@@ -19,7 +19,7 @@
 #include "st.h"
 #endif
 
-KHASH_MAP_INIT_INT(iv, mrb_value);
+KHASH_INIT(iv, mrb_sym, mrb_value, 1, kh_int_hash_func, kh_int_hash_equal)
 
 #ifndef FALSE
 #define FALSE   0