Patch #9155 (Mantis #1793)

Fix a regression that caused the region settings not to save.
Still no SQLite support for region settings. MySQL now functional.

OpenSim/Data/MySQL/MySQLDataStore.cs

@@ -735,6 +735,7 @@ namespace OpenSim.Data.MySQL
                 {
                     RegionSettings rs = new RegionSettings();
                     rs.RegionUUID = regionUUID;
+                    rs.OnSave += StoreRegionSettings;
 
                     StoreRegionSettings(rs);
 

OpenSim/Region/Environment/Modules/World/Estate/EstateManagementModule.cs

@@ -120,6 +120,9 @@ namespace OpenSim.Region.Environment.Modules.World.Estate
 
         public void setEstateTerrainBaseTexture(IClientAPI remoteClient, int corner, LLUUID texture)
         {
+            if(texture == LLUUID.Zero)
+                return;
+
             switch (corner)
             {
                 case 0: