#357 [1.23.4 - beta] Undesired borders when multiple layers graphs are exported

[Fellype]

When a graph with more than one layer is exported to a figure undesired borders are added to the figure.
The attached figures explain the issue better than I can describe (one layer, no problem; two layers -> undesired borders).
As far I can remember, it didn't happen in the 1.23 version and previous.
I've built SciDAVis 1.23.4 under Slackware, using Qt4.

[Fellype]

I forgot to mention that the file format of the exported figure does not look to influence the issue (tested with png and svg).

[gbm]

Attached patch solves the problem

[Fellype]

Solved!
Good job.