Bug 876776 - Do not crash when dumping a NULL object, r=terrence

--HG--
extra : rebase_source : 01e96eb326c42b62b49251dce5dac7e2fbc031b5

js/src/jsfriendapi.cpp

@@ -635,6 +635,10 @@ js_DumpChars(const jschar *s, size_t n)
 JS_FRIEND_API(void)
 js_DumpObject(JSObject *obj)
 {
+    if (!obj) {
+        fprintf(stderr, "NULL\n");
+        return;
+    }
     obj->dump();
 }