* time.c (obj2subsecx): subsec might be GC'ed. try to get rid of SEGV on mswin

CI.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@56076 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

time.c

@@ -2453,6 +2453,7 @@ obj2subsecx(VALUE obj, VALUE *subsecx)
     else {
         divmodv(num_exact(obj), INT2FIX(1), &obj, &subsec);
         *subsecx = w2v(rb_time_magnify(v2w(subsec)));
+	RB_GC_GUARD(subsec);
     }
     return obj2ubits(obj, 6); /* vtm->sec */
 }