Fill a rectangular region with a character
void SLsmg_fill_region (r, c, nr, nc, ch)
int r
int c
unsigned int nr
unsigned int nc
unsigned char ch
The SLsmg_fill_region function may be used to a
rectangular region with the character ch in the current color.
The rectangle's upper left corner is at row r and column
c, and spans nr rows and nc columns. The position
of the virtual cursor will be left at (r, c).
SLsmg_write_char, SLsmg_set_color