Fix some errors from features run on 404 pages.

src/General/Header.coffee

@@ -91,7 +91,7 @@ Header =
       @setBarPosition Conf['Bottom Header']
       @
 
-    $.ready =>
+    Main.ready =>
       @footer = footer = $.id 'boardNavDesktopFoot'
       if a = $ "a[href*='/#{g.BOARD}/']", footer
         a.className = 'current'

src/General/Index.coffee

@@ -82,6 +82,7 @@ Index =
 
     @update()
     $.asap (-> $('.board > .thread > .postContainer', doc) or d.readyState isnt 'loading'), ->
+      return unless Main.isThisPageLegit()
       Index.hat = $ '.board > .thread > img:first-child'
       if Index.hat and Index.nodes
         for threadRoot in Index.nodes
@@ -106,6 +107,7 @@ Index =
       $.before topNavPos, Index.navLinks
 
     $.asap (-> $('.pagelist', doc) or d.readyState isnt 'loading'), ->
+      return unless Main.isThisPageLegit()
       if pagelist = $('.pagelist')
         $.replace pagelist, Index.pagelist
       else

src/General/Main.coffee

@@ -273,6 +273,10 @@ Main =
         d.title not in ['4chan - Temporarily Offline', '4chan - Error', '504 Gateway Time-out']
     Main.thisPageIsLegit
 
+  ready: (cb) ->
+    $.ready ->
+      cb() if Main.isThisPageLegit()
+
   css: """
   <%= grunt.file.read('src/General/css/font-awesome.css').replace(/\s+/g, ' ').replace(/\\/g, '\\\\').trim() %>
   <%= grunt.file.read('src/General/css/style.css').replace(/\s+/g, ' ').trim() %>

src/Miscellaneous/Banner.coffee

@@ -7,7 +7,7 @@ Banner =
 
     # Let 4chan's JS load the banner if enabled; otherwise, load it ourselves.
     if g.BOARD.ID isnt 'f'
-      $.ready -> $.queueTask Banner.load
+      Main.ready -> $.queueTask Banner.load
 
   ready: ->
     banner = $ ".boardBanner"

src/Miscellaneous/Fourchan.coffee

@@ -36,7 +36,7 @@ Fourchan =
         cb:   @math
 
     # Disable 4chan's ID highlighting (replaced by IDHighlight) and reported post hiding.
-    $.ready ->
+    Main.ready ->
       $.globalEval '''
         (function() {
           window.clickable_ids = false;

src/Monitoring/ThreadUpdater.coffee

@@ -27,7 +27,7 @@ ThreadUpdater =
     updateLink = $.el 'span',
       className: 'brackets-wrap updatelink'
     $.extend updateLink, <%= html('<a href="javascript:;">Update</a>') %>
-    $.ready ->
+    Main.ready ->
       $.add $('.navLinksBot'), [$.tn(' '), updateLink]
     $.on updateLink.firstElementChild, 'click', @update