Fixed vim and zsh

zsh/modules/git/functions/git_current_branch

@@ -0,0 +1,9 @@
+# slightly modified git_current_branch from oh-my-zsh for theme compatibility
+local ref
+ref=$(command git symbolic-ref --quiet HEAD 2> /dev/null)
+local ret=${?}
+if [[ ${ret} != 0 ]]; then
+  [[ ${ret} == 128 ]] && return  # no git repo.
+  ref=$(command git rev-parse --short HEAD 2> /dev/null) || return
+fi
+print ${ref#refs/heads/}