Bug 1416456 - Fix --enable-gczeal build bustage in JS engine. r=jandem

MozReview-Commit-ID: 7o5pRbwBZ14

--HG--
extra : rebase_source : d3df2c931fa54ac7ce8f7278f29a372fa3ff53b1

js/src/gc/Verifier.cpp

@@ -690,10 +690,12 @@ CheckGrayMarkingTracer::checkCell(Cell* cell)
         fprintf(stderr, "\n");
         dumpCellPath();
 
+#ifdef DEBUG
         if (cell->getTraceKind() == JS::TraceKind::Object) {
             fprintf(stderr, "\n");
             DumpObject(static_cast<JSObject*>(cell), stderr);
         }
+#endif
     }
 }