[PATCH] completion: fix warning for zsh

Otherwise the user might get something like:

  git-completion.sh:2466: command not found: compdef

If this script is loaded before compinit. The script would work either
way, but let's not be more annoying to the user.

Signed-off-by: Felipe Contreras <redacted>
---
 contrib/completion/git-completion.bash | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/contrib/completion/git-completion.bash b/contrib/completion/git-completion.bash
index af13fcc..0b77eb1 100644
--- a/contrib/completion/git-completion.bash
+++ b/contrib/completion/git-completion.bash

@@ -2404,6 +2404,8 @@ __gitk_main ()
 if [[ -n ${ZSH_VERSION-} ]]; then
 	echo "WARNING: this script is deprecated, please see git-completion.zsh" 1>&2
 
+	autoload -U +X compinit && compinit
+
 	__gitcomp ()
 	{
 		emulate -L zsh

-- 
1.8.0.1