Fix compile error in r11279.

TBR=jkummerow@chromium.org

Review URL: https://chromiumcodereview.appspot.com/9969156

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11280 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

test/cctest/test-weakmaps.cc

@@ -192,7 +192,9 @@ TEST(Regress2060a) {
 // other strong paths are correctly recorded in the slots buffer.
 TEST(Regress2060b) {
   FLAG_always_compact = true;
+#ifdef DEBUG
   FLAG_verify_heap = true;
+#endif
   LocalContext context;
   v8::HandleScope scope;
   Handle<JSFunction> function =