Fix playground bug when dist=true

tentative fix for npm import with PG

Playground/js/index.js

@@ -153,8 +153,10 @@
                                 index = parseInt(query);
                                 if (!isNaN(index)) {
                                     loadScriptFromIndex(index);
-                                } else {
+                                } else if (query.indexOf("=") === -1) {
                                     loadScript("scripts/" + query + ".js", query);
+                                } else {
+                                    loadScript("scripts/basic scene.js", "Basic scene");
                                 }
                             } else {
                                 loadScript("scripts/basic scene.js", "Basic scene");

Tools/Gulp/gulp-addModuleExports.js

@@ -13,7 +13,10 @@ module.exports = function (varName, subModule, extendsRoot) {
                 basicInit = `__extends(root["BABYLON"], factory()); `
             }*/
 
-            return `(function universalModuleDefinition(root, factory) {
+            return `\n\n(function universalModuleDefinition(root, factory) {
+                if (root && root["BABYLON"]) {
+                    return;
+                }
     if(typeof exports === 'object' && typeof module === 'object')
         module.exports = factory();
     else if(typeof define === 'function' && define.amd)

dist/preview release/gui/babylon.gui.js

@@ -4153,7 +4153,12 @@ var BABYLON;
         GUI.VirtualKeyboard = VirtualKeyboard;
     })(GUI = BABYLON.GUI || (BABYLON.GUI = {}));
 })(BABYLON || (BABYLON = {}));
+
+
 (function universalModuleDefinition(root, factory) {
+                if (root && root["BABYLON"]) {
+                    return;
+                }
     if(typeof exports === 'object' && typeof module === 'object')
         module.exports = factory();
     else if(typeof define === 'function' && define.amd)

dist/preview release/loaders/babylonjs.loaders.js

@@ -4768,7 +4768,12 @@ var BABYLON;
 })(BABYLON || (BABYLON = {}));
 
 //# sourceMappingURL=KHR_materials_pbrSpecularGlossiness.js.map
+
+
 (function universalModuleDefinition(root, factory) {
+                if (root && root["BABYLON"]) {
+                    return;
+                }
     if(typeof exports === 'object' && typeof module === 'object')
         module.exports = factory();
     else if(typeof define === 'function' && define.amd)

dist/preview release/serializers/babylonjs.serializers.js

@@ -129,7 +129,12 @@ var BABYLON;
 })(BABYLON || (BABYLON = {}));
 
 //# sourceMappingURL=babylon.objSerializer.js.map
+
+
 (function universalModuleDefinition(root, factory) {
+                if (root && root["BABYLON"]) {
+                    return;
+                }
     if(typeof exports === 'object' && typeof module === 'object')
         module.exports = factory();
     else if(typeof define === 'function' && define.amd)