Retrieve floor data from backing store.
void CtdlGetFloor(struct floor *flbuf, int floor_num);
Retrieve the information for floor floor_num from the backing store.
|flbuf||A pointer to a structure to hold the floor information|
|floor_num||the id number of the floor|
Upon completion the structure passed in with flbuf will be filled with the information pertaining to the requested floor.
If the floor does not exist then the structure will be cleared to 0.