Small bugfix and Mousewheel version update

I've tried to load this plugin dynamically and what i've got is only blank page, because document.write replaces everything..

js/uncompressed/jquery.mCustomScrollbar.js

@@ -955,7 +955,7 @@ along with this program.  If not, see http://www.gnu.org/licenses/lgpl.html.
 	$.support.msPointer=window.navigator.msPointerEnabled; /*MSPointer support*/
 	/*plugin dependencies*/
 	var _dlp=("https:"==document.location.protocol) ? "https:" : "http:";
-	$.event.special.mousewheel || document.write('<script src="'+_dlp+'//cdnjs.cloudflare.com/ajax/libs/jquery-mousewheel/3.0.6/jquery.mousewheel.min.js"><\/script>');
+	$.event.special.mousewheel || $('<script>', { src: _dlp+'//cdnjs.cloudflare.com/ajax/libs/jquery-mousewheel/3.1.6/jquery.mousewheel.min.js' }).appendTo('body');
 	/*plugin fn*/
 	$.fn.mCustomScrollbar=function(method){
 		if(methods[method]){
@@ -966,4 +966,4 @@ along with this program.  If not, see http://www.gnu.org/licenses/lgpl.html.
 			$.error("Method "+method+" does not exist");
 		}
 	};
-})(jQuery);
+})(jQuery);