scm: git: output log if revisions() catches an error (#7146).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@5763 e93f8b46-1217-0410-a6f0-8f06a7374b81

lib/redmine/scm/adapters/git_adapter.rb

@@ -264,7 +264,8 @@ module Redmine
             end
           end
           revs
-        rescue ScmCommandAborted
+        rescue ScmCommandAborted => e
+          logger.error("git log #{from_to.to_s} error: #{e.message}")
           revs
         end