Merge pull request #1778 from sheppard/master

make AMD declaration anonymous

src/Leaflet.js

@@ -10,7 +10,7 @@ if (typeof module === 'object' && typeof module.exports === 'object') {
 
 // define Leaflet as an AMD module
 } else if (typeof define === 'function' && define.amd) {
-	define('leaflet', [], function () { return L; });
+	define(L);
 }
 
 // define Leaflet as a global L variable, saving the original L to restore later if needed