gc.c: rb_gc_set_params

* gc.c (rb_gc_set_params): define as separate function.
  RUBY_ALIAS_FUNCTION is for simple alias only, the third parameter
  will be ignored on gcc.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43993 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

gc.c

@@ -5419,7 +5419,11 @@ ruby_gc_set_params(int safe_level)
 #endif
 }
 
-RUBY_ALIAS_FUNCTION_VOID(rb_gc_set_params(void), ruby_gc_set_params, (rb_safe_level()))
+void
+rb_gc_set_params(void)
+{
+    ruby_gc_set_params(rb_safe_level());
+}
 
 void
 rb_objspace_reachable_objects_from(VALUE obj, void (func)(VALUE, void *), void *data)