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
     }
 }

OpenSim/Region/CoreModules/Scripting/WorldComm/WorldCommModule.cs

@@ -392,7 +392,7 @@ namespace OpenSim.Region.CoreModules.Scripting.WorldComm
                 if (channel == 0)
                 {
                    // Channel 0 goes to viewer ONLY
-                    m_scene.SimChat(Utils.StringToBytes(msg), ChatTypeEnum.Broadcast, 0, pos, name, id, target, false, false);
+                    m_scene.SimChat(Utils.StringToBytes(msg), ChatTypeEnum.Direct, 0, pos, name, id, target, false, false);
                     return;
                 }