scm: git: back out r5673 (#7146).

recovery "block_given?" in adapter.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@5777 e93f8b46-1217-0410-a6f0-8f06a7374b81

lib/redmine/scm/adapters/git_adapter.rb

@@ -214,7 +214,11 @@ module Redmine
                     :message    => changeset[:description],
                     :paths      => files
                   })
+                  if block_given?
+                    yield revision
+                  else
                     revs << revision
+                  end
                   changeset = {}
                   files = []
                 end
@@ -260,9 +264,13 @@ module Redmine
                 :message    => changeset[:description],
                 :paths      => files
                  })
+              if block_given?
+                yield revision
+              else
                 revs << revision
               end
             end
+          end
           revs
         rescue ScmCommandAborted => e
           logger.error("git log #{from_to.to_s} error: #{e.message}")