Multi World NPCs + patch on Player interactions

Made NPCs now work properly on multiworld system. Solved multiple issues
regarding Player Shops not giving back items properly when owner exits.
Added restriction on changing channels at FM rooms, preventing shop
owner entering Cash Shop.

scripts/npc/1022105.js

@@ -0,0 +1,33 @@
+var status = -1;
+var map = 910220000;
+var num = 5;
+var maxp = 5;
+
+function action(mode, type, selection) {
+    if (mode == 1) {
+	status++;
+    } else {
+	if (status <= 1) {
+	    cm.dispose();
+	    return;
+	}
+	status--;
+    }
+    if (status == 0) {
+	var selStr = "Would you like to go into the Training Center?";
+	for (var i = 0; i < num; i++) {
+		selStr += "\r\n#b#L" + i + "#Training Center " + i + " (" + cm.getPlayerCount(map + i) + "/" + maxp + ")#l#k";
+	}
+	cm.sendSimple(selStr);
+    } else if (status == 1) {
+	if (selection < 0 || selection >= num) {
+		cm.dispose();
+	} else if (cm.getPlayerCount(map + selection) >= maxp) {
+		cm.sendNext("This training center is full.");
+		status = -1;
+	} else {
+		cm.warp(map + selection, 0);
+		cm.dispose();
+	}
+    }
+}