Bug 782252 - Don't treat PRStatus as nsresult; r=ehsan

netwerk/socket/nsSOCKSIOLayer.cpp

@@ -1263,8 +1263,7 @@ nsSOCKSIOLayerAddToSocket(PRInt32 family,
     layer->secret = (PRFilePrivate*) infoObject;
     rv = PR_PushIOLayer(fd, PR_GetLayersIdentity(fd), layer);
 
-    if (NS_FAILED(rv))
-    {
+    if (rv == PR_FAILURE) {
         LOGERROR(("PR_PushIOLayer() failed. rv = %x.", rv));
         NS_RELEASE(infoObject);
         PR_DELETE(layer);