Fix: Bit shifting of the 32-bit value with a subsequent expansion to the 64-bit type.

We now shift the 64-bit value, which is now treated correctly.

Engine/source/terrain/terrCell.cpp

@@ -849,7 +849,7 @@ void TerrCell::_updateMaterials()
          if ( index == U8_MAX || index > 63 )
             continue;
 
-         mMaterials |= (U64)(1<<index);
+         mMaterials |= (U64)((U64)1<<index);
       }
    }