Prevent infinite loading when no font is specified

Author: goldfire

package.json

@@ -1,6 +1,6 @@
 {
   "name": "phaser-webpack-loader",
-  "version": "1.0.0",
+  "version": "1.0.1",
   "author": "GoldFire Studios, Inc. (http://goldfirestudios.com)",
   "description": "Asset loader for Phaser + Webpack.",
   "author": "James Simpson <[email protected]> (http://goldfirestudios.com)",

src/index.js

@@ -75,6 +75,10 @@ export default class WebpackLoader extends Phaser.Plugin {
    * @return {Promise} Returns when fonts are ready to use.
    */
   _loadFonts() {
+    if (Object.keys(this.fonts).length === 0) {
+      return Promise.resolve();
+    }
+    
     return new Promise((resolve) => {
       WebFont.load(Object.assign({}, this.fonts, {
         active: resolve,