Merge pull request phaserjs#3057 from igorpetushkov/ph3

[.Offscreen-For-WebGL-XXXXXXXX] render error

Author: photonstorm

v3/src/gameobjects/text/static/TextWebGLRenderer.js

@@ -2,7 +2,7 @@ var GameObject = require('../../GameObject');
 
 var TextWebGLRenderer = function (renderer, src, interpolationPercentage, camera)
 {
-    if (GameObject.RENDER_MASK !== src.renderFlags || (src.cameraFilter > 0 && (src.cameraFilter & camera._id)))
+    if (GameObject.RENDER_MASK !== src.renderFlags || (src.cameraFilter > 0 && (src.cameraFilter & camera._id)) || src.text === '')
     {
         return;
     }
@@ -12,7 +12,7 @@ var TextWebGLRenderer = function (renderer, src, interpolationPercentage, camera
         src.canvasTexture = renderer.uploadCanvasToGPU(src.canvas, src.canvasTexture, true);
         src.dirty = false;
     }
-
+    
     renderer.spriteBatch.addSpriteTexture(src, camera, src.canvasTexture, src.canvas.width, src.canvas.height);
 };