it always paint partial table border which have line style of DOUBLE_THIN.
Becouse the partial of the border line is out of the invalid window rect.
so, we extend it.

Change-Id: I9d95ca71a96cfa869c68d9d2200f29c7cd447eca
Reviewed-on: https://gerrit.libreoffice.org/20701Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: jan iversen <jani@documentfoundation.org>