Fix implicit fallthrough.

Signed-off-by: Andreas Mohr <and@gmx.li>

src/filemanager/achown.c

@@ -501,6 +501,7 @@ chl_callback (Widget * w, Widget * sender, widget_msg_t msg, int parm, void *dat
         default:
             break;
         }
+        MC_FALLTHROUGH;
 
     default:
         return dlg_default_callback (w, sender, msg, parm, data);

src/vfs/tar/tar.c

@@ -806,6 +806,7 @@ tar_open_archive (struct vfs_s_super *archive, const vfs_path_t * vpath,
             default:
                 break;
             }
+            MC_FALLTHROUGH;
 
             /* Record of zeroes */
         case STATUS_EOFMARK:   /* If error after 0's */