Bug 444358 - [Grid] if you set column headers invisible and row headers
visible, the row header for the first row doesn't appear

Verify if column header will be showed, if not, i'll paint first row
header too.

Change-Id: Ifcfe6803d996ffda0893f555ef988c98461e79e6
Signed-off-by: mpaturzo <caosmpz@yahoo.it>