Fix Git.transform_kwarg

Kwargs were not transformed correctly if a value was set to 0 due to
wrong if condition.

Signed-off-by: František Nečas <fifinecas@seznam.cz>

1 files changed, 1 insertions, 1 deletions

diff --git a/git/cmd.py b/git/cmd.py
index 64c3d480..50b1e321 100644
--- a/git/cmd.py
+++ b/git/cmd.py
@@ -893,7 +893,7 @@ class Git(LazyMixin):
         else:
             if value is True:
                 return ["--%s" % dashify(name)]
-            elif value not in (False, None):
+            elif value is not False and value is not None:
                 return ["--%s=%s" % (dashify(name), value)]
         return []