component/bt : fix gatt write memory leak

components/bt/bluedroid/stack/gatt/gatt_sr.c

@@ -1076,6 +1076,8 @@ void gatts_process_write_req (tGATT_TCB *p_tcb, UINT8 i_rcb, UINT16 handle,
             if (status == GATT_SUCCESS) {
                 attp_send_sr_msg(p_tcb, p_msg);
                 gatt_dequeue_sr_cmd(p_tcb);
+            } else {
+                GKI_freebuf(p_msg);
             }
 
         } else {