Fix skip summary metrics regression since introducing flotr2

Ting

2014-04-16 d0751dc352ef06c067593f31f5423fce357f8f1f

 src/main/java/com/gitblit/utils/JGitUtils.java

@@ -711,7 +711,7 @@
      try {

         // resolve object id

         ObjectId branchObject;

         if (StringUtils.isEmpty(objectId)) {

         if (StringUtils.isEmpty(objectId) || "HEAD".equalsIgnoreCase(objectId)) {

            branchObject = getDefaultBranch(repository);

         } else {

            branchObject = repository.resolve(objectId);