[Rails] Fixed a bug in asset hosts support when compiling outside the…

… context of a controller.

lib/compass/sass_extensions/functions/urls.rb

@@ -18,7 +18,6 @@ def image_url(path)
     path = path.value # get to the string value of the literal.
     # Short curcuit if they have provided an absolute url.
     if absolute_path?(path)
-      puts "#{path} is absolute"
       return Sass::Script::String.new("url(#{path})")
     end
 
@@ -44,7 +43,9 @@ def image_url(path)
     end
 
     # Compute the asset host unless in relative mode.
-    asset_host = (compute_asset_host(path) unless relative?)
+    asset_host = if !relative? && Compass.configuration.asset_host
+      Compass.configuration.asset_host.call(path)
+    end
 
     # Compute and append the cache buster if there is one.
     if buster = compute_cache_buster(path, real_path)
@@ -101,12 +102,4 @@ def default_cache_buster(path, real_path)
     end
   end
 
-  def compute_asset_host(path)
-    if Compass.configuration.asset_host
-      Compass.configuration.asset_host.call(path)
-    else
-      nil
-    end
-  end
-
-end
+end