Update src/cata_tiles.cpp

Co-authored-by: Jianxiang Wang (王健翔) <[email protected]>

src/cata_tiles.cpp

@@ -2947,7 +2947,7 @@ bool cata_tiles::draw_sprite_at(
 
     printErrorIf( ret != 0, "SDL_RenderCopyEx() failed" );
     // this reference passes all the way back up the call chain back to
-    // cata_tiles::draw() here.draw_points_cache[row][col].com.height_3d
+    // cata_tiles::draw() here.draw_points_cache[z][row][col].com.height_3d
     // where we are accumulating the height of every sprite stacked up in a tile
     height_3d += tile.height_3d;
     return true;