Bug 17420 - record export fails when itemtype on biblio - followup

Same as previous patch for misc/export_records.pl.

Test plan :
- Use syspref item-level_itypes = biblio record
- Run misc/export_records.pl
=> Without patch you get an error : DBD::mysql::st execute failed: Unknown column 'biblioitems.itemtype' in 'where clause' ...
=> With patch you get a correct export file

Signed-off-by: Bernardo Gonzalez Kriegel <bgkriegel@gmail.com>
Export Ok, no errors.

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>

misc/export_records.pl

@@ -144,7 +144,7 @@ if ( $record_type eq 'bibs' ) {
                 ?
                   C4::Context->preference('item-level_itypes')
                     ? ( 'items.itype' => $itemtype )
-                    : ( 'biblioitems.itemtype' => $itemtype )
+                    : ( 'me.itemtype' => $itemtype )
                 : ()
             ),