LP 1496977: Duplicate Code in OpenILS::Application::Cat::AssetCommon

LP 1496977: Duplicate Code in OpenILS::Application::Cat::AssetCommon

It looks like two lines of code got duplicated in commit e2f6cca0 in
AssetCommon.  This duplication can lead to data loss for the function
update_fleshed_copies.  It also lead to the following warning when
you use OpenILS::Application::Cat::AssetCommon in a script:

"my" variable $sc_entries masks earlier declaration in same scope at
/usr/local/share/perl/5.18.2/OpenILS/Application/Cat/AssetCommon.pm
line 371.

After this patch, the warning disappears.

Signed-off-by: Jason Stephenson <jstephenson@mvlc.org>
Signed-off-by: Ben Shum <bshum@biblio.org>