Merge pull request phaserjs#990 from lucbloom/warn-texture-not-found

Warn about missing textures and show the key that the author was trying to use.

Author: photonstorm

src/gameobjects/Image.js

@@ -262,6 +262,7 @@ Phaser.Image.prototype.loadTexture = function (key, frame) {
         }
         else if (typeof key === 'string' && !this.game.cache.checkImageKey(key))
         {
+            console.warn("Texture with key '" + key + "' not found.");
             this.key = '__missing';
             this.setTexture(PIXI.TextureCache[this.key]);
         }

src/gameobjects/Sprite.js

@@ -386,6 +386,7 @@ Phaser.Sprite.prototype.loadTexture = function (key, frame) {
         }
         else if (typeof key === 'string' && !this.game.cache.checkImageKey(key))
         {
+            console.warn("Texture with key '" + key + "' not found.");
             this.key = '__missing';
             this.setTexture(PIXI.TextureCache[this.key]);
         }

src/gameobjects/TileSprite.js

@@ -358,6 +358,7 @@ Phaser.TileSprite.prototype.loadTexture = function (key, frame) {
         }
         else if (typeof key === 'string' && !this.game.cache.checkImageKey(key))
         {
+            console.warn("Texture with key '" + key + "' not found.");
             this.key = '__missing';
             this.setTexture(PIXI.TextureCache[this.key]);
         }