change chattype on llRegionSayTo when sending to avatar viewer only.

Thanks Royale for pointing this

OpenSim/Framework/ChatTypeEnum.cs

@@ -38,6 +38,7 @@ namespace OpenSim.Framework
         DebugChannel = 6,
         Region = 7,
         Owner = 8,
+        Direct = 9, //llRegionSayTo
         Broadcast = 0xFF
     }
 }