This NPC callback was added in SA-MP 0.3a and will not work in earlier versions!
This callback gets called whenever the NPC sees a ClientMessage. This will be everytime a SendClientMessageToAll function is used and everytime a SendClientMessage function is sent towards the NPC. This callback won't be called when someone says something. For a version of this with player text, see NPC:OnPlayerText.
|color||The color the ClientMessage is.|
|text||The actual message.|
This callback does not handle returns.