From 08039f1fa5a76bf2afdabe15fda02a4179f204a2 Mon Sep 17 00:00:00 2001
From: jmt <jmt>
Date: Wed, 21 Oct 2009 07:18:36 +0000
Subject: [PATCH] Tweak permitted indices for GPS route insert commands.

---
 src/Instrumentation/gps.cxx | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/Instrumentation/gps.cxx b/src/Instrumentation/gps.cxx
index 290dc6e4d..731e8f486 100644
--- a/src/Instrumentation/gps.cxx
+++ b/src/Instrumentation/gps.cxx
@@ -1290,7 +1290,7 @@ void GPS::setCommand(const char* aCmd)
     defineWaypoint();
   } else if (!strcmp(aCmd, "route-insert-before")) {
     int index = _scratchNode->getIntValue("index");
-    if (index < 0) {
+    if (index < 0 || (_routeMgr->size() == 0)) {
       index = _routeMgr->size();
     } else if (index >= _routeMgr->size()) {
       SG_LOG(SG_INSTR, SG_WARN, "GPS:route-insert-before, bad index:" << index);
@@ -1300,7 +1300,7 @@ void GPS::setCommand(const char* aCmd)
     insertWaypointAtIndex(index);
   } else if (!strcmp(aCmd, "route-insert-after")) {
     int index = _scratchNode->getIntValue("index");
-    if (index < 0) {
+    if (index < 0 || (_routeMgr->size() == 0)) {
       index = _routeMgr->size();
     } else if (index >= _routeMgr->size()) {
       SG_LOG(SG_INSTR, SG_WARN, "GPS:route-insert-after, bad index:" << index);
-- 
2.39.5