#23 cobol.loader.picture_parser problem with precision using (#) syntax

[RHarris]

picture_parser function does not currently increment value of precision when decimal is true and c == '('

I think adding the following line before out.append( (irpt-1)*out[-1] ) would be appropriate:

if decimal: precision += irpt

[RHarris]

correction...the above fix isn't correct.

the line SHOULD be:
if decimal: precision = irpt

[Steven F. Lott]

To be slightly more general.

if decimal: precision += irpt

Not sure of PIC 9(5)V99(2) would ever actually happen. But.

[RHarris]

well, that's what I thought, thus my initial recommended fix, however, precision+= irpt didn't work but precision = irpt did...I didn't do additional debugging to understand why...

[Steven F. Lott]

Added unit test cases. Looks to be fixed.