Fix bug with unhighlighting slices (fix by Johan Sall Larson)

git-svn-id: https://flot.googlecode.com/svn/trunk@279 1e0a6537-2640-0410-bfb7-f154510ff394

jquery.flot.pie.js

@@ -607,11 +607,8 @@ More detail and specific examples can be found in the included HTML file.
 				}
 			}
 			
-			// if no slice was found, quit
-			if (!item) 
-				return;
-				
 			// highlight the slice
+			if (item) 
 			    highlight(item.series, eventname);
 				
 			// trigger any hover bind events