Bug 14496: Improving opac-detail.pl performances

Bug 14496: Improving opac-detail.pl performances

Get notes and subjects from MARC record
ONLY when XSLT is not activated.

It's useless doing it when XSLT is activated,
because XSLT takes care of it by its own.

=> With this patch, we are saving precious
milliseconds

I compared the display of some records in XSLT view with and without patch, was the same (as expected).
Signed-off-by: Marc Veron <veron@veron.ch>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
On a slower server, I saw a time save of 0.0274 to 0.0908 seconds (with XSLT).
Signed-off-by: Tomas Cohen Arazi <tomascohen@unc.edu.ar>