* Fixed a potential div by zero with terrain commands.

OpenSim/Region/Terrain.BasicTerrain/libTerrainBSD/Channel/Grid.cs

@@ -65,6 +65,12 @@ namespace libTerrain
         {
             SetDiff();
 
+            if (minv == maxv)
+            {
+                Fill(minv);
+                return this;
+            }
+
             double max = FindMax();
             double min = FindMin();
 
@@ -73,6 +79,8 @@ namespace libTerrain
             for (x = 0; x < w; x++)
             {
                 for (y = 0; y < h; y++)
+                {
+                    if (min != max)
                     {
                         double val = (map[x, y] - min) * (1.0 / max - min);
                         val *= maxv - minv;
@@ -80,6 +88,11 @@ namespace libTerrain
 
                         map[x, y] = val;
                     }
+                    else
+                    {
+                        map[x, y] = 0.5;
+                    }
+                }
             }
 
             return this;