[jhbuild] do not force full URI when remapping git module

[Frederic Peters <fpeters src gnome org>]

commit 20d10fafd77f06f9c8f78061af909af5d507430f
Author: Frederic Peters <fpeters 0d be>
Date:   Sat Apr 18 11:05:46 2009 +0200

    do not force full URI when remapping git module
---
 jhbuild/versioncontrol/git.py |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/jhbuild/versioncontrol/git.py b/jhbuild/versioncontrol/git.py
index 85408f6..7055b22 100644
--- a/jhbuild/versioncontrol/git.py
+++ b/jhbuild/versioncontrol/git.py
@@ -75,8 +75,10 @@ class GitRepository(Repository):
             module = name
         # allow remapping of branch for module
         if name in self.config.branches:
-            module, revision = self.config.branches.get(name)
-        else:
+            new_module, revision = self.config.branches.get(name)
+            if new_module:
+                module = new_module
+        if not urlparse.urlparse(module)[0]:
             module = urlparse.urljoin(self.href, module)
         return GitBranch(self, module, subdir, checkoutdir, revision, tag)