Concurrency fix + new scripts

Fixed some situation involving concurrency upon using getCharacters()
from MapleMap, added scripts and other bug fixes.

wz/Quest.wz/Act.img.xml

@@ -9994,6 +9994,12 @@
     <imgdir name="1">
     </imgdir>
     <imgdir name="0">
+      <imgdir name="item">
+        <imgdir name="0">
+          <int name="id" value="4031619"/>
+          <int name="count" value="1"/>
+        </imgdir>
+      </imgdir>
     </imgdir>
   </imgdir>
   <imgdir name="2127">