Move FL_SINGLETON to FL_USER1

This frees FL_USER0 on both T_MODULE and T_CLASS.

Note: prior to this, FL_SINGLETON was never set on T_MODULE,
so checking for `FL_SINGLETON` without first checking that
`FL_TYPE` was `T_CLASS` was valid. That's no longer the case.

1 files changed, 1 insertions, 1 deletions

diff --git a/ext/objspace/objspace_dump.c b/ext/objspace/objspace_dump.c
index 866a49eff4..d05fe66037 100644
--- a/ext/objspace/objspace_dump.c
+++ b/ext/objspace/objspace_dump.c
@@ -560,7 +560,7 @@ dump_object(VALUE obj, struct dump_config *dc)
                 }
             }
 
-            if (FL_TEST(obj, FL_SINGLETON)) {
+            if (RCLASS_SINGLETON_P(obj)) {
                 dump_append(dc, ", \"singleton\":true");
             }
         }