Fix of CK_Cancel handling in Tree widget.

Signed-off-by: Andrew Borodin <aborodin@vmail.ru>

src/filemanager/boxes.c

@@ -404,7 +404,6 @@ tree_callback (Dlg_head * h, Widget * sender, dlg_msg_t msg, int parm, void *dat
         return MSG_HANDLED;
 
     case DLG_ACTION:
-        /* command from buttonbar */
         return send_message ((Widget *) find_tree (h), WIDGET_COMMAND, parm);
 
     default:

src/filemanager/tree.c

@@ -1070,6 +1070,9 @@ tree_execute_cmd (WTree * tree, unsigned long command)
     case CK_Delete:
         tree_rmdir (tree);
         break;
+    case CK_Cancel:
+        /* don't close tree due to SIGINT */
+        break;
     default:
         res = MSG_NOT_HANDLED;
     }