Merge pull request #4419 from dearblue/fix-always-static

Fix `FLAG_SRC_STATIC` always set in `mrb_read_irep()` with `MRB_USE_CUSTOM_RO_DATA_P`

src/load.c

@@ -608,7 +608,7 @@ read_irep(mrb_state *mrb, const uint8_t *bin, uint8_t flags)
 mrb_irep*
 mrb_read_irep(mrb_state *mrb, const uint8_t *bin)
 {
-#ifdef MRB_USE_ETEXT_EDATA
+#if defined(MRB_USE_ETEXT_EDATA) || defined(MRB_USE_CUSTOM_RO_DATA_P)
   uint8_t flags = mrb_ro_data_p((char*)bin) ? FLAG_SRC_STATIC : FLAG_SRC_MALLOC;
 #else
   uint8_t flags = FLAG_SRC_STATIC;