Bug 19350 - Holds without link in 773 trigger SQL::Abstract::puke

Bug 19350 - Holds without link in 773 trigger SQL::Abstract::puke

Test:
1. find bibio without items which has something in field 773
   (for us, it's article) but doesn't have 0 or 9 (host item entry)
2. click on hold in left menu
3. verify application error
4. apply patch and verify that it works

Signed-off-by: Josef Moravec <josef.moravec@gmail.com>
(cherry picked from commit 5c873a408f40fd1660d0b09c6de8c1ca2e252d11)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>
(cherry picked from commit a2fd973b644c9956ce7c35bdc2fcdb7b0e71e45e)
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>