staging: rtl8723au: qos_asm23a(): Don't pass through an invalid priority

Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8723au/core/rtw_xmit.c

@@ -394,6 +394,7 @@ u8 qos_acm23a(u8 acm_mask, u8 priority)
 	default:
 		DBG_8723A("qos_acm23a(): invalid pattrib->priority: %d!!!\n",
 			  priority);
+		change_priority = 0;
 		break;
 	}