Small rooms aren't always built correctly

[matt-dray]

For example, a 4 by 4 room won't always have walls all around the edge. Possibly because of placing actors/items?

game_map <- .make_dungeon(
  iterations = 5, n_row = 4, n_col = 4, n_rooms = 5, is_snake = FALSE, is_organic = TRUE
)

.cat_map(game_map, is_colour)

Results in:

a # # # 
$ E @ # 
. . . # 
# # # # 

Could enforce room dimensions to be above a certain size.