generateBlockImage does not restore driver status on block plot error.
@davidcl)
Reported by Clement DAVID (Bug description:
> generateBlockImage:102-106
> o = block;
> ierr = execstr("block = " + o.gui + "(""plot"",o)", "errcatch");
> if (ierr <> 0) then
> return;
> end
> If ierr <> 0, the post operation (restoring the driver) is not executed. The
> try-clause should include these lines at least, as proposed in the
> attachment.
Other information: