pacify some warnings on OpenBSD

src/dump.c

@@ -97,7 +97,6 @@ get_pool_block_size(mrb_state *mrb, mrb_irep *irep)
     default:
       break;
     }
-
     mrb_gc_arena_restore(mrb, ai);
   }
 
@@ -590,7 +589,7 @@ write_section_debug(mrb_state *mrb, mrb_irep *irep, uint8_t *cur)
   const uint8_t *bin = cur;
   struct rite_section_debug_header *header;
   mrb_sym *filenames;
-  size_t filenames_len, i;
+  size_t filenames_len = 0, i;
   uint8_t *filenames_len_out;
   uint32_t dlen;
 

src/load.c

@@ -496,7 +496,8 @@ read_lineno_record_file(mrb_state *mrb, FILE *fp, mrb_irep *irep, uint8_t *buf)
 {
   const size_t record_header_size = 4;
   int result;
-  size_t i, len, buf_size;
+  size_t i, buf_size;
+  uint32_t len;
   void *ptr;
 
   if (fread(buf, record_header_size, 1, fp) == 0) {
@@ -561,7 +562,8 @@ static mrb_irep*
 read_irep_record_file(mrb_state *mrb, FILE *fp, uint8_t *buf)
 {
   const size_t record_header_size = 1 + 4;
-  size_t buf_size, len, i;
+  size_t buf_size, i;
+  uint32_t len;
   mrb_irep *irep = NULL;
   void *ptr;