Hit Reactor animation fix + deny spawn points

Fixed reactor sometimes not animating between state changes and
introduced mechanic to deny spawning mobs at spawn points.

wz/Reactor.wz/2519000.img.xml

@@ -67,8 +67,8 @@
     </imgdir>
   </imgdir>
   <imgdir name="1">
-    <canvas name="0" width="1" height="1">
-      <vector name="origin" x="0" y="0"/>
+    <canvas name="0" width="100" height="121">
+      <vector name="origin" x="49" y="121"/>
     </canvas>
   </imgdir>
   <string name="action" value="davyScript0"/>