DefaultUserAgent: the value given by META http-equiv="default-style" was not being set (bug).

(cherry picked from commit a355549)

Author: carlosame

src/io/sf/carte/doc/agent/net/DefaultUserAgent.java

@@ -161,7 +161,7 @@ public DOMDocument readURL(URL url) throws IOException, io.sf.carte.doc.Document
 		for (int i = listL - 1; i >= 0; i--) {
 			if ("Default-Style".equalsIgnoreCase(((Element) list.item(i)).getAttribute("http-equiv"))) {
 				String metaDefStyle = ((Element) list.item(i)).getAttribute("content");
-				if (metaDefStyle.length() == 0) {
+				if (metaDefStyle.length() != 0) {
 					// Per HTML4 spec § 14.3.2:
 					// "If two or more META declarations or HTTP headers specify 
 					//  the preferred style sheet, the last one takes precedence."