Core/Misc: Define some methods const

src/server/game/AI/SmartScripts/SmartAI.cpp

@@ -698,7 +698,7 @@ void SmartAI::DoAction(const int32 param)
     GetScript()->ProcessEventsFor(SMART_EVENT_ACTION_DONE, NULL, param);
 }
 
-uint32 SmartAI::GetData(uint32 /*id*/)
+uint32 SmartAI::GetData(uint32 /*id*/) const
 {
     return 0;
 }
@@ -712,7 +712,7 @@ void SmartAI::SetGUID(uint64 /*guid*/, int32 /*id*/)
 {
 }
 
-uint64 SmartAI::GetGUID(int32 /*id*/)
+uint64 SmartAI::GetGUID(int32 /*id*/) const
 {
     return 0;
 }