fix broken list swipe deletion for last entry

don't copy-pasta everything..

Signed-off-by: Aron Heinecke <aron.heinecke@t-online.de>

Author: 0xpr03

app/src/main/java/vocabletrainer/heinecke/aron/vocabletrainer/fragment/ListPickerFragment.java

@@ -83,7 +83,7 @@ public void onItemClick(View view, int position) {
 
     @Override
     public void onSwiped(ListRecyclerAdapter.VListViewHolder viewHolder, int position) {
-        if(position < adapter.getItemCount() -1){
+        if(position < adapter.getItemCount()){
             VList entry = adapter.getItemAt(position);
             Snackbar snackbar = Snackbar
                     .make(recyclerView, R.string.List_Deleted_Message, Snackbar.LENGTH_LONG)