[z1980] Fix DB_STRICTED_CHECK output for gossip

This fixes to integrity check to report unused gossip_menu entries. Before only menus used by creatures with gossip_menu_items were reported

Signed-off-by: Schmoozerd <schmoozerd@scriptdev2.com>

(based on commit 7f06eff)

Signed-off-by: Nighoo <nighoo@gmail.com>

(cleaned version of 77d1093)

(based on commit [s1572] - 3547ca7)