[gnumeric] css: use "background-color", not "background".

[Morten Welinder <mortenw src gnome org>]

commit fa87ea05c04ee0cae5a559624d0cdb8f5840a322
Author: Morten Welinder <terra gnome org>
Date:   Mon Mar 25 16:24:35 2013 -0400

    css: use "background-color", not "background".

 src/gnumeric.css |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/gnumeric.css b/src/gnumeric.css
index 42c3f1a..5e1377d 100644
--- a/src/gnumeric.css
+++ b/src/gnumeric.css
@@ -1,7 +1,7 @@
 /* ------------------------------------------------------------------------- */
 /* The ItemGrid is the canvas area that holds all the cells.  */
 ItemGrid {
-  background: white;
+  background-color: white;
 }
 
 /* Function markers are enabled from View->View Properties->Cell Markers */
@@ -65,7 +65,7 @@ GtkDrawingArea all-button {
 /* GnmNotebook is a fake notebook holding just the sheet tabs area */
 
 GnmNotebook tab {
-  /* background: #ff0000; */ /* Debug */
+  /* background-color: #ff0000; */ /* Debug */
 }
 
 GnmNotebook {