From bbec662483b18441eee77d34e0147e02583b3c1b Mon Sep 17 00:00:00 2001
From: Andrew Tridgell <tridge@samba.org>
Date: Tue, 25 Sep 2012 07:21:03 +1000
Subject: [PATCH] APM: fixed build warning

---
 ArduPlane/GCS_Mavlink.pde | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ArduPlane/GCS_Mavlink.pde b/ArduPlane/GCS_Mavlink.pde
index b1d90d20fe..0fc1c89dbc 100644
--- a/ArduPlane/GCS_Mavlink.pde
+++ b/ArduPlane/GCS_Mavlink.pde
@@ -1920,7 +1920,7 @@ mission_failed:
             (chan == MAVLINK_COMM_0 && gcs3.initialised)) {
             mavlink_channel_t out_chan = (mavlink_channel_t)(((uint8_t)chan)^1);
             // only forward if it would fit in our transmit buffer
-            if (comm_get_txspace(out_chan) > msg->len + MAVLINK_NUM_NON_PAYLOAD_BYTES) {
+            if (comm_get_txspace(out_chan) > ((uint16_t)msg->len) + MAVLINK_NUM_NON_PAYLOAD_BYTES) {
                 _mavlink_resend_uart(out_chan, msg);
             }
         }