Don't pass on ChaneWaterHeight event from EventManager is new water height is less than 0

This is to stop bad values and subsequent viewer crashes.
Thanks to Michelle Argus for this patch.

1 files changed, 6 insertions, 0 deletions

diff --git a/OpenSim/Region/Framework/Scenes/EventManager.cs b/OpenSim/Region/Framework/Scenes/EventManager.cs
index 4a4d98f..4f71915 100644
--- a/OpenSim/Region/Framework/Scenes/EventManager.cs
+++ b/OpenSim/Region/Framework/Scenes/EventManager.cs
@@ -1564,6 +1564,12 @@ namespace OpenSim.Region.Framework.Scenes
 
         public void TriggerRequestChangeWaterHeight(float height)
         {
+            if (height < 0)
+            {
+                // ignore negative water height
+                return;
+            }
+
             RequestChangeWaterHeight handlerRequestChangeWaterHeight = OnRequestChangeWaterHeight;
             if (handlerRequestChangeWaterHeight != null)
             {