Add proper cast.
MODIFY
src/fmt_fp.c
src/fmt_fp.c
@@ -440,7 +440,7 @@ mrb_float_to_cstr(mrb_state *mrb, char *buf, size_t len, const char *fmt, mrb_fl
mrb_raise(mrb, E_ARGUMENT_ERROR, "invalid format string");
}
*cstr.buf = '\0';
- return (int)cstr.buf - buf;
+ return (int)(cstr.buf - buf);
}
#else /* MRB_DISABLE_STDIO || _WIN32 || _WIN64 */
#include <mruby.h>

Add proper cast.