Don't error if the image has loaded when it's not hovering anymore.

4chan_x.user.js

@@ -3313,6 +3313,7 @@
     },
     load: function() {
       var style;
+      if (this !== ui.el) return;
       style = this.style;
       return ui.hover({
         clientX: -45 + parseInt(style.left),

script.coffee

@@ -2608,6 +2608,7 @@ imgHover =
     $.on @,     'mousemove', ui.hover
     $.on @,     'mouseout',  imgHover.mouseout
   load: ->
+    return if @ isnt ui.el
     # 'Fake' mousemove event by giving required values.
     {style} = @
     ui.hover