#20 DRAW statement bugs

[Attila Haraszti]

The following DRAW statement does not work correctly:

DRAW "BM100,100D100R100U100L100"

There are two bugs in there:

1. "B" means draw nothing in the WHOLE string not just the next move "M"

2. If you clear the "B" the move "M" lose one character after coma means
   "M100,100" will go to 100,0

Workaround:

1. Do not use "B"
2. Use "M100,0100" which work correctly