Guild PQ + fixed negative EXP error

Implemented Guild PQ. Fixed a problem introduced earlier where negative
EXP would be deemed as "integer overflow", provoking many game breaking
issues as result.

scripts/portal/statuegate_open.js

@@ -25,7 +25,7 @@
 */
 function enter(pi) {
     if (pi.getPlayer().getMap().getReactorByName("statuegate").getState() == 1) {
-        pi.warp(990000301);
+        pi.warp(990000301, 0);
         return true;
     } else {
         pi.getPlayer().dropMessage(5, "The gate is closed.");