Bugfix: Failed to execute 'removeChild'

Author: SergioGutTal

dist/leaflet.utfgrid-src.js

@@ -262,7 +262,9 @@ L.UtfGrid = (L.Layer || L.Class).extend({
 		window[wk][functionName] = function (data) {
 			self._cache[key] = data;
 			delete window[wk][functionName];
-			head.removeChild(script);
+			if (script.parentElement===head) {
+				head.removeChild(script);
+			}
 			self._finish_request(key);
 		};
 

dist/leaflet.utfgrid.js

@@ -253,7 +253,9 @@ L.UtfGrid = (L.Layer || L.Class).extend({
 		window[wk][functionName] = function (data) {
 			self._cache[key] = data;
 			delete window[wk][functionName];
-			head.removeChild(script);
+			if (script.parentElement===head) {
+				head.removeChild(script);
+			}
 			self._finish_request(key);
 		};