From: Chris Yeoh (yeohc@au1.ibm.com)

Here's the patch that clamps llGround to using sane values avoiding
runtime errors.

1 files changed, 12 insertions, 0 deletions

diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
index 6fd2544..499273c 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
@@ -937,6 +937,18 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
             Vector3 pos = m_host.GetWorldPosition();
             int x = (int)(pos.X + offset.x);
             int y = (int)(pos.Y + offset.y);
+
+            // Clamp to valid position
+            if (x<0) 
+                x = 0;
+            else if (x>=World.Heightmap.Width)
+                x = World.Heightmap.Width-1;
+            if (y<0) 
+                y = 0;
+            else if (y>=World.Heightmap.Height)
+                y = World.Heightmap.Height-1;
+            
+
             return World.GetLandHeight(x, y);
         }