Fixed Forum-3288: Exception when Threads pad opened for running application

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/branches/2.0@1281 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/AddIns/Misc/Debugger/Debugger.AddIn/Project/Src/Pads/RunningThreadsPad.cs

@@ -115,11 +115,13 @@ namespace ICSharpCode.SharpDevelop.Gui.Pads
 					item.Text = thread.ID.ToString();
 					item.Tag = thread;
 					item.SubItems.Add(thread.Name);
-					Function location;
+					Function location = null;
+					if (thread.Process.IsPaused) {
 						location = thread.LastFunctionWithLoadedSymbols;
 						if (location == null) {
 							location = thread.LastFunction;
 						}
+					}
 					if (location != null) {
 						item.SubItems.Add(location.Name);
 					} else {