Fix work_in_progress in empty git repos

I noticed that the function ``work_in_progress``, which is used in the "gallois"-theme, would print ``fatal: bad default revision 'HEAD'`` in a new folder after ``git init``. This is the fix.

Fix work_in_progress in empty git repos
05b3ea34 · Steven Schmid · 61e3951e · 05b3ea34
Commit 05b3ea34 authored Oct 01, 2013 by Steven Schmid
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git.plugin.zsh plugins/git/git.plugin.zsh +1 -1

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--- a/plugins/git/git.plugin.zsh
+++ b/plugins/git/git.plugin.zsh
@@ -138,7 +138,7 @@ compdef _git glp=git-log
 #
 # This function return a warning if the current branch is a wip
 function work_in_progress() {
-  if $(git log -n 1 | grep -q -c wip); then
+  if $(git log -n 1 2>/dev/null | grep -q -c wip); then
    echo "WIP!!"
  fi
 }