Merge pull request #1329 from carsonmcdonald/unsignedsignedfix2

Unsigned signed warning fixes

mrbgems/mruby-struct/src/struct.c

@@ -185,8 +185,7 @@ static mrb_value
 mrb_struct_set(mrb_state *mrb, mrb_value obj, mrb_value val)
 {
   const char *name;
-  int i;
-  size_t len;
+  size_t i, len;
   mrb_sym mid;
   mrb_value members, slot, *ptr, *ptr_members;
 

src/dump.c

@@ -334,8 +334,7 @@ static int
 write_lineno_record(mrb_state *mrb, mrb_irep *irep, uint8_t* bin)
 {
   uint8_t *cur = bin;
-  size_t filename_len = 0;
-  int iseq_no;
+  size_t filename_len = 0, iseq_no;
 
   cur += sizeof(uint32_t); /* record size */
 

src/gc.c

@@ -630,8 +630,7 @@ obj_free(mrb_state *mrb, struct RBasic *obj)
 static void
 root_scan_phase(mrb_state *mrb)
 {
-  int j;
-  size_t i, e;
+  size_t i, e, j;
 
   if (!is_minor_gc(mrb)) {
     mrb->gray_list = 0;