[backend] fix typo in alllocked test

Commit 8ad9324 changed the code
to not propagate med events to locked projects. Unfortunately
it used 'locked' instead of the correct 'lock' to check for
locked projects.

src/backend/BSSched/ProjPacks.pm

@@ -1032,10 +1032,10 @@ sub setup_projects {
 
       # check if all packages are locked
       my $alllocked;
-      if ($proj->{'locked'} && BSUtil::enabled($repoid, $proj->{'locked'}, 0, $myarch)) {
+      if ($proj->{'lock'} && BSUtil::enabled($repoid, $proj->{'lock'}, 0, $myarch)) {
 	$alllocked = 1;
-	for my $pack (grep {$_->{'locked'}} values(%{$proj->{'package'} || {}})) {
-	  $alllocked = 0 unless BSUtil::enabled($repoid, $pack->{'locked'}, 1, $myarch);
+	for my $pack (grep {$_->{'lock'}} values(%{$proj->{'package'} || {}})) {
+	  $alllocked = 0 unless BSUtil::enabled($repoid, $pack->{'lock'}, 1, $myarch);
 	}
       }
       if ($alllocked) {