fix: review problems

src/vm/fzl_vm.c

@@ -50,7 +50,8 @@ fzl_vm_t *fzl_mkvm(const char *filepath)
   }
 
   char hdr[5];
-  fread(hdr, sizeof(char), 5, fd);
+  fread(hdr, sizeof(char), 5,
+        fd); // NOTE: add red bytes check (also for freads below)
   if (memcmp(hdr, expect_hdr, 5) != 0)
   {
     snprintf(last_err, sizeof(last_err), "magic check error");