Revert "Merge pull request #708 from noocsharp/master"

This reverts commit 3dbfafa, reversing
changes made to 232f857.

Author: samme

src/pixi/renderers/webgl/utils/WebGLSpriteBatch.js

@@ -637,10 +637,7 @@ PIXI.WebGLSpriteBatch.prototype.flush = function ()
         gl.vertexAttribPointer(shader.colorAttribute, 4, gl.UNSIGNED_BYTE, true, stride, 16);
 
         // Texture index
-        if (PIXI._enableMultiTextureToggle)
-        {
-            gl.vertexAttribPointer(shader.aTextureIndex, 1, gl.FLOAT, false, stride, 20);
-        }
+        gl.vertexAttribPointer(shader.aTextureIndex, 1, gl.FLOAT, false, stride, 20);
     }
 
     // upload the verts to the buffer