checks for leading slash in frame ID

Author: Russell Toris

build/roslib.js

@@ -1180,6 +1180,9 @@ ROSLIB.TFClient.prototype.processFeedback = function(tf) {
   var that = this;
   tf.transforms.forEach(function(transform) {
     var frameID = transform.child_frame_id;
+    if (frameID[0] !== '/') {
+      frameID = '/' + frameID;
+    }
     var info = that.frameInfos[frameID];
     if (info !== undefined) {
       info.transform = new ROSLIB.Transform({