# HG changeset patch
# User Marcin Kuzminski <marcin@python-works.com>
# Date 1340235251 -7200
# Node ID c919d8c4f6a29da5dccd7fa8ed1c9478ae125eeb
# Parent  9989d727ef1bb968e87ce071b00e96f5f889ed33
fixed git diff function when initial revision had no parents to compare with

diff -r 9989d727ef1b -r c919d8c4f6a2 rhodecode/lib/vcs/backends/git/changeset.py
--- a/rhodecode/lib/vcs/backends/git/changeset.py	Wed Jun 20 22:16:02 2012 +0200
+++ b/rhodecode/lib/vcs/backends/git/changeset.py	Thu Jun 21 01:34:11 2012 +0200
@@ -195,7 +195,9 @@
         return _prev(self, branch)
 
     def diff(self, ignore_whitespace=True, context=3):
-        return ''.join(self.repository.get_diff(self, self.parents[0],
+        rev1 = self.parents[0] if self.parents else self.repository.EMPTY_CHANGESET
+        rev2 = self
+        return ''.join(self.repository.get_diff(rev1, rev2,
                                     ignore_whitespace=ignore_whitespace,
                                     context=context))