fixed rendering when variables were used

lib/torque/provider.json.js

@@ -172,6 +172,7 @@
       return {
         x: x,
         y: y,
+        z: zoom,
         coord: {
           x: coord.x,
           y: coord.y,

lib/torque/renderer/point.js

@@ -135,7 +135,7 @@
           if(c) {
            var sp = sprites[c];
            if(!sp) {
-             sp = sprites[c] = this.generateSprite(shader, c, _.extend({ zoom: tile.zoom, 'frame-offset': frame_offset }, shaderVars));
+             sp = sprites[c] = this.generateSprite(shader, c, _.extend({ zoom: tile.z, 'frame-offset': frame_offset }, shaderVars));
            }
            //var x = tile.x[posIdx]*res - (sp.width >> 1);
            //var y = (256 - res - res*tile.y[posIdx]) - (sp.height >> 1);

vendor/carto.js

@@ -4815,7 +4815,7 @@ tree.Value.prototype.toJS = function() {
     v = "'" + v + "'";
   } else if (val.is === 'field') {
     // replace [varuable] by ctx['variable']
-    v = v.replace(/\[(.*)\]/g, "ctx['\$1']")
+    v = v.replace(/\[(.*)\]/g, "data['\$1']")
   }
   return "_value = " + v + ";";
 };