Can now create one-character directory names.

Dropping on the lower half of an open, empty directory will now drop
inside it rather than after it.

c/Hotlist

@@ -586,12 +586,12 @@ static _kernel_oserror * hotlist_new_directory(hotlist_item * parent, char * dir
     if (!*directory_name) directory_name = tokens;
     else
     {
-      int len = strlen(directory_name) - 1;
+      int len = strlen(directory_name);
 
-      while (len && directory_name[len] <= ' ') len--;
+      while (len && directory_name[len - 1] <= ' ') len--;
 
       if (!len) directory_name = tokens;
-      else directory_name[len + 1] = '\0';
+      else directory_name[len] = '\0';
     }
   }
 
@@ -5131,14 +5131,13 @@ static int hotlist_drag_completed_handler(int event_code, WimpPollBlock * event,
         if ((-winy % item_height) > item_height / 2)
         {
           /* If we're over half way past the item, place after it, unless */
-          /* it is an open directory with something inside. Again, the    */
-          /* null handler dealing with highlighting directory sprites     */
-          /* reflects this situation correctly.                           */
+          /* it is an open directory. Again, the null handler dealing     */
+          /* with highlighting directory sprites reflects this situation  */
+          /* correctly.                                                   */
 
           if (
                targetitem->type == hl_directory      &&
-               targetitem->flags & HOTLIST_D_IS_OPEN &&
-               targetitem->data.directory_content
+               targetitem->flags & HOTLIST_D_IS_OPEN
              )
           {
             position = HOTLIST_POSITION_BEGINNING;
@@ -5642,7 +5641,7 @@ static int hotlist_null_handler(int event_code, WimpPollBlock * event, IdBlock *
       ChkError(hotlist_get_shape(&xmin, &xmax, item));
 
       /* If we're over the directory sprite, or half way under the item height when */
-      /* the directory is open and has contents.                                    */
+      /* the directory is open.                                                     */
 
       if (
            (
@@ -5652,8 +5651,7 @@ static int hotlist_null_handler(int event_code, WimpPollBlock * event, IdBlock *
            ||
            (
              ((-y % item_height) > item_height / 2) &&
-             item->flags & HOTLIST_D_IS_OPEN        &&
-             item->data.directory_content
+             item->flags & HOTLIST_D_IS_OPEN
            )
          )
       {