Bug 20518: Don't show "Messages" header and link on patron details if there are no messages
This patch modifies the patron detail page so that the "Messages" header
is not displayed if there are no messages.
Unrelated: A minor change was made to moremember.pl to quiet an error in
the log, "Use of uninitialized value $print in string eq at
members/moremember.pl line 219."
To test, apply the patch and open the detail page for a patron who has
no messages. There should be no "Messages" header or "add message" link.
Add a message to the patron's account. The message should appear, along
with the "Messages" header and "add message" link.
The error logs should show no errors.
Signed-off-by: Maksim Sen <maksim.sen@inlibro.com> Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de> Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>