Fix non-functional --printCSS/-p option

This option didn't do anything, because the value it set (showCSS) wasn't considered when generating the output.

Author: udittmer

org/w3c/css/css/StyleSheetGenerator.java

@@ -197,7 +197,8 @@ public StyleSheetGenerator(ApplContext ac, String title, StyleSheet style,
 
         produceError();
         produceWarning();
-        produceStyleSheet();
+        if (CssValidator.showCSS)
+            produceStyleSheet();
 
         try {
             String _template_dir = "org/w3c/css/css/";