map_get_tile
From ArchaicPixels: HuC and PCEAS Documentation
map_get_tile(char x, char y); [ 3.20+ ]
Return the tile index as defined in the tile array used in the most
recent call to set_tile_data(). The 'x/y' argument is in pixel
units, unlike the put_tile functions and thus this function is ideal
for colision routines.
