Check stack depth in MarkSharpObjects too (310864, r=mrbkap).

js/src/jsobj.c

@@ -406,6 +406,12 @@ MarkSharpObjects(JSContext *cx, JSObject *obj, JSIdArray **idap)
     uintN attrs;
 #endif
     jsval val;
+    int stackDummy;
+
+    if (!JS_CHECK_STACK_SIZE(cx, stackDummy)) {
+        JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_OVER_RECURSED);
+        return NULL;
+    }
 
     map = &cx->sharpObjectMap;
     table = map->table;