bug 298912 fixed style definition for graphic

Signed-off-by: Florian Thienel <florian@thienel.org>
diff --git a/sourceediting/plugins/org.eclipse.wst.xml.vex.docbook/styles/docbook-plain.css b/sourceediting/plugins/org.eclipse.wst.xml.vex.docbook/styles/docbook-plain.css
index 071deb1..717603e 100644
--- a/sourceediting/plugins/org.eclipse.wst.xml.vex.docbook/styles/docbook-plain.css
+++ b/sourceediting/plugins/org.eclipse.wst.xml.vex.docbook/styles/docbook-plain.css
@@ -363,7 +363,7 @@
 	margin: 20px 0;
 }
 
-graphic: {
+graphic {
 	display: block;
 	background-image: attr(fileref);
 }