Update issue 2479

possible fix for "The content of the adapter has changed but ListView did not receive a notification."

src/com/fsck/k9/activity/ChooseFolder.java

@@ -341,8 +341,9 @@ public class ChooseFolder extends K9ListActivity
                 }
             });
             mAdapter.setNotifyOnChange(false);
-            mAdapter.clear();
             int selectedFolder = -1;
+            try {
+            	mAdapter.clear();
             	int position = 0;
             	for (String name : localFolders)
             	{
@@ -375,6 +376,15 @@ public class ChooseFolder extends K9ListActivity
             		}
             		position++;
             	}
+            } finally {
+            	mAdapter.setNotifyOnChange(true);
+            	runOnUiThread(new Runnable() {
+            		public void run() {
+            			//            	runOnUiThread(
+            			mAdapter.notifyDataSetChanged();
+            		}
+            	});
+            }
 
             mHandler.dataChanged();