Fix for detached illegalstateexception

src/org/thoughtcrime/securesms/ConversationListFragment.java

@@ -112,10 +112,13 @@ public class ConversationListFragment extends SherlockListFragment
     searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
       @Override
       public boolean onQueryTextSubmit(String query) {
+        if (isAdded()) {
           ConversationListFragment.this.queryFilter = query;
           ConversationListFragment.this.getLoaderManager().restartLoader(0, null, ConversationListFragment.this);
           return true;
         }
+        return false;
+      }
       @Override
       public boolean onQueryTextChange(String newText) {
         return onQueryTextSubmit(newText);