git-servlet: Fix comparing uploadFactory with the wrong DISABLED instance

Change-Id: I53f71dc0e3c68839da5ff5a2e0f3eeb8340e4793
Signed-off-by: Robin Rosenberg <robin.rosenberg@dewire.com>

org.eclipse.jgit.http.server/src/org/eclipse/jgit/http/server/GitServlet.java

@@ -185,7 +185,7 @@ public void init(final ServletConfig config) throws ServletException {
 
 		initialized = true;
 
-		if (uploadPackFactory != ReceivePackFactory.DISABLED) {
+		if (uploadPackFactory != UploadPackFactory.DISABLED) {
 			serve("*/git-upload-pack")//
 					.with(new UploadPackServlet(uploadPackFactory));
 		}