build: .git can be a file (worktree)

diff --git a/autogen.sh b/autogen.sh
index 55ca446d71e074869820d9ae87ff9be2f85cf748..7b1ce997e714c16209c5d52f07adfdc2361231be 100755 (executable)
--- a/autogen.sh
+++ b/autogen.sh
@@ -2,7 +2,7 @@
 
 set -e
 
-[ ! -e .gitmodules ] || [ ! -d .git ] || {
+[ ! -e .gitmodules ] || [ ! -e .git ] || {
     echo "autogen.sh: updating git submodules"
     git submodule init
     git submodule update