Improve backwards compatibility with PCB tracks

[DarwinNE]

FidoCadJ 0.24.5 can interpret non integer withs for PCB tracks (while rounding up the value after the parsing).

FidoCadJ 0.24.6 fully implement non integer withs in the editor.

Drawings done with version 0.24.6 can be interpreted (yet non rendered perfectly) with version 0.24.5. However, the non-integer values create errors with versions <0.24.5.

While a certain degree of incompatibility is inevitable, there is no need to write code such as the following one:
[FIDOCAD] PL 85 95 20 95 1.0 0
Where the following code would be more compact retaining full compatibility:
[FIDOCAD] PL 85 95 20 95 1 0

Of course, that will not be done in the following situation:
[FIDOCAD] PL 85 95 20 95 3.25 0

D.