PR #1093 - quest leader vs thrown invocation items

Pull request from entrez:  if hero throws (or kicks) an invocation
item or the Amulet at the quest leader, identify it and give it back
instead of treating the throw (or kicked item) as an attack.

In addition to the fixes entry I've made several tweaks to related
code, mostly to refer to the leader as "Someone" rather than "It" if
unseen.

Closes #1093

src/questpgr.c

@@ -659,4 +659,6 @@ deliver_splev_message(void)
     }
 }
 
+#undef QTEXT_FILE
+
 /*questpgr.c*/