#335: call save only if 'active'

Sortable.js

@@ -704,8 +704,13 @@
 						}
 					}
 
-					// Drag end event
+					if (Sortable.active) {
-					Sortable.active && _dispatchEvent(this, rootEl, 'end', dragEl, rootEl, oldIndex, newIndex);
+						// Drag end event
+						_dispatchEvent(this, rootEl, 'end', dragEl, rootEl, oldIndex, newIndex);
+
+						// Save sorting
+						this.save();
+					}
 				}
 
 				// Nulling
@@ -726,9 +731,6 @@
 
 				activeGroup =
 				Sortable.active = null;
-
-				// Save sorting
-				this.save();
 			}
 		},