recover monster thrash numbers and hidden town flags in valleydy

rsrc/scenarios/valleydy/towns/town12.xml

@@ -8,7 +8,9 @@
     <bounds top="0" left="0" bottom="47" right="47" />
     <difficulty>4</difficulty>
     <lighting>dark</lighting>
-    <flags />
+    <flags>
+        <chop kills="75" />
+    </flags>
     <item id="0">
         <type>178</type>
         <contained>true</contained>