load.c: suppress warning

* load.c (rb_load_internal): suppress clobbered-by-longjmp warning by
  gcc 4.4.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41555 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

load.c

@@ -567,7 +567,7 @@ rb_load_internal(VALUE fname, int wrap)
     volatile VALUE self = th->top_self;
     volatile int loaded = FALSE;
     volatile int mild_compile_error;
-#ifndef __GNUC__
+#if !defined __GNUC__ || (__GNUC__ == 4 && __GNUC_MINOR__ == 4)
     rb_thread_t *volatile th0 = th;
 #endif
 
@@ -599,7 +599,7 @@ rb_load_internal(VALUE fname, int wrap)
     }
     POP_TAG();
 
-#ifndef __GNUC__
+#if !defined __GNUC__ || (__GNUC__ == 4 && __GNUC_MINOR__ == 4)
     th = th0;
     fname = RB_GC_GUARD(fname);
 #endif