Fixes findbugs warning - dereferencing null in exception case

Simon Harrer

2013-07-18 fbe265fa787e4be9cb63c6bae2ef30b9400d9afc

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

@@ -87,7 +87,9 @@
      } catch (Exception e) {

         e.printStackTrace();

      } finally {

         is.close();

         if(is != null) {

            is.close();

         }

      }

   }

}