Garbage lines in the output of 'git branch' break git adapter (#31120).

Contributed by Chad Petersen.


git-svn-id: http://svn.redmine.org/redmine/trunk@18046 e93f8b46-1217-0410-a6f0-8f06a7374b81

lib/redmine/scm/adapters/git_adapter.rb

@@ -84,6 +84,7 @@ module Redmine
           git_cmd(cmd_args) do |io|
             io.each_line do |line|
               branch_rev = line.match('\s*(\*?)\s*(.*?)\s*([0-9a-f]{40}).*$')
+              next unless branch_rev
               bran = GitBranch.new(scm_iconv('UTF-8', @path_encoding, branch_rev[2]))
               bran.revision =  branch_rev[3]
               bran.scmid    =  branch_rev[3]