Fix uses of uninitialized variables

- Replace unknown008 array with two separate variables in Object code

- Fix mismatched safe_delete() of an array

zone/merc.cpp

@@ -5786,7 +5786,7 @@ bool Merc::AddMercToGroup(Merc* merc, Group* group) {
 
 void Client::InitializeMercInfo() {
 	for(int i=0; i<MAXMERCS; i++) {
-		m_mercinfo[i].mercid = 0;
+		m_mercinfo[i] = {};
 	}
 }