[syslinux:master] efi: prevent git command in non-git tree #2

[syslinux-bot for Gene Cumm]

Commit-ID:  138f262d7f93a0794cb542d54a266ed3a322e50d
Gitweb:     http://www.syslinux.org/commit/138f262d7f93a0794cb542d54a266ed3a322e50d
Author:     Gene Cumm <gene.cumm at gmail.com>
AuthorDate: Tue, 23 Dec 2014 12:07:40 -0500
Committer:  Gene Cumm <gene.cumm at gmail.com>
CommitDate: Mon, 5 Jan 2015 20:43:13 -0500

efi: prevent git command in non-git tree #2

efi/clean-gnu-efi.sh presumes it's in a git repo.  Test first.

Signed-off-by: Gene Cumm <gene.cumm at gmail.com>

---
 efi/clean-gnu-efi.sh | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/efi/clean-gnu-efi.sh b/efi/clean-gnu-efi.sh
index 84ed17a..58def28 100755
--- a/efi/clean-gnu-efi.sh
+++ b/efi/clean-gnu-efi.sh
@@ -23,7 +23,9 @@ objdir=$(readlink -f "$2")
 
 (
 	cd ../..
-	git submodule update --init
+	if [ -d .git ]; then
+	    git submodule update --init
+	fi
 )
 
 if [ -d "$objdir/gnu-efi" ];then