[dw-free] Generate_background_css uses improper CSS

[afuna]

[commit: http://hg.dwscoalition.org/dw-free/rev/423e2a13d827]

http://bugs.dwscoalition.org/show_bug.cgi?id=1179

Fix generate_background_css, when no background color is given.

Patch by av8rmike.

Files modified:

• bin/upgrading/s2layers/core2.s2

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diff -r f55c3450d521 -r 423e2a13d827 bin/upgrading/s2layers/core2.s2
--- a/bin/upgrading/s2layers/core2.s2	Sat May 09 06:46:53 2009 +0000
+++ b/bin/upgrading/s2layers/core2.s2	Sat May 09 07:11:08 2009 +0000
@@ -2613,11 +2613,8 @@ function generate_background_css (
 "Take the values for the properties in a background image group and output the appropriate
 line of CSS for inclusion in your stylesheet."
 {
-    if (not defined $background_color) {
-        $background_color = "auto";
-    }
-
-    var string background_css = "background: $background_color";
+    var string color = ($background_color.as_string != "") ? $background_color.as_string : "transparent";
+    var string background_css = "background: $color";
 
     if ($background_image != "") {
         $background_css = $background_css + " url($background_image) $background_image_repeat $background_image_position";
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