Core: Fix more warnings

--HG--
branch : trunk

src/server/game/Maps/Map.cpp

@@ -1499,7 +1499,7 @@ float  GridMap::getLiquidLevel(float x, float y)
 uint8  GridMap::getTerrainType(float x, float y)
 {
     if (!m_liquid_type)
-        return m_liquidType;
+        return 0;
 
     x = 16 * (32 - x/SIZE_OF_GRIDS);
     y = 16 * (32 - y/SIZE_OF_GRIDS);