Move the place of a curly bracket. This is just a cosmetic change.

src/variable.c

@@ -20,8 +20,7 @@ typedef int (iv_foreach_func)(mrb_state*,mrb_sym,mrb_value,void*);
 #define MRB_SEGMENT_SIZE 4
 #endif
 
-typedef struct segment
-{
+typedef struct segment {
   mrb_sym key[MRB_SEGMENT_SIZE];
   mrb_value val[MRB_SEGMENT_SIZE];
   struct segment *next;