nit fix for bug 558754 and remove bogus spot-fix that didn't have review (r=brendan)

js/src/jsiter.cpp

@@ -170,6 +170,7 @@ Enumerate(JSContext *cx, JSObject *obj, jsid id, bool enumerable, uintN flags,
         }
         if (flags & JSITER_FOREACH) {
             jsval *vp = vec.end() - 1;
+
             if (!obj->getProperty(cx, id, vp))
                 return false;
             if (flags & JSITER_KEYVALUE && !NewKeyValuePair(cx, id, *vp, vp))

js/src/jstracer.cpp

@@ -13662,9 +13662,6 @@ TraceRecorder::record_JSOP_ENDITER()
     jsval& v = stackval(-1);
     JS_ASSERT(!JSVAL_IS_PRIMITIVE(v));
 
-    if (JSVAL_TO_OBJECT(v)->getClass() == &js_GeneratorClass.base)
-        RETURN_STOP_A("can't trace ENDITER for generators");
-
     enterDeepBailCall();
 
     LIns* args[] = { stack(-1), cx_ins };