Avoid NPE when the default branch cannot be identified

Robin Rosenberg

2013-09-01 02ede7f11c6fb28ca53fc240905cd1b140236f08

 src/main/java/com/gitblit/LogoServlet.java

@@ -76,6 +76,7 @@
            contentType = "image/png";

         }

         response.setContentType(contentType);

         response.setHeader("Cache-Control", "public, max-age=3600, must-revalidate");

         OutputStream os = response.getOutputStream();

         byte[] buf = new byte[4096];

         int bytesRead = is.read(buf);