Bug 267477 - Cope without global history (XUL runner).

ChatZilla only.
r=rginda

extensions/irc/xul/content/handlers.js

@@ -901,7 +901,8 @@ function my_showtonet (e)
 
             // Update everything.
             // Welcome to history.
-            client.globalHistory.addPage(this.getURL());
+            if (client.globalHistory)
+                client.globalHistory.addPage(this.getURL());
             updateTitle(this);
             this.updateHeader();
             client.updateHeader();
@@ -1914,7 +1915,8 @@ function my_cjoin (e)
     {
         this.display (getMsg(MSG_YOU_JOINED, e.channel.unicodeName), "JOIN",
                       e.server.me, this);
-        client.globalHistory.addPage(this.getURL());
+        if (client.globalHistory)
+            client.globalHistory.addPage(this.getURL());
 
         if ("joinTimer" in this)
         {

extensions/irc/xul/content/static.js

@@ -1416,7 +1416,8 @@ function mainStep()
 function openQueryTab(server, nick)
 {
     var user = server.addUser(nick);
-    client.globalHistory.addPage(user.getURL());
+    if (client.globalHistory)
+        client.globalHistory.addPage(user.getURL());
     if (!("messages" in user))
     {
         var value = "";

extensions/irc/xul/locale/en-US/chatzilla.properties

@@ -599,6 +599,7 @@ msg.err.offline       = The host software platform (e.g. Mozilla, Firefox) is in
 msg.err.badalias      = Malformed alias: %S"
 msg.err.no.ctcp.cmd   = %S is not a valid CTCP function for this client
 msg.err.no.ctcp.help  = %S does not have any help information
+msg.err.unknown.host  = The host application URL "%S" is not recognised. Please report what application you are running ChatZilla in, and the URL given.
 msg.err.unable.to.print = The current view does not support printing.
 
 # Better IRC error messages