Bug 29684: Fix warn about js/locale_data.js (memberentry.pl)

Bug 29684: Fix warn about js/locale_data.js (memberentry.pl)

To reproduce (memberentry.pl):
1) Head over to the patron details page, press edit button to open the
memberentry.pl page.
2) The error message should have appeared in your log file about
"File not found : default/js/locale_data.js".
3) Apply the patch.
4) Open the edit page again, ensure that the new error massage like
that didn't appear.

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>