Portability fix: use head -n 1 iso head -1

diff --git a/bootstrap b/bootstrap
index 841c31bc6c85b0597570155bb04944f381b0bbf1..4fcb42bdf73c96cf1a8cc7acb16e41d5b2bd32ce 100755 (executable)
--- a/bootstrap
+++ b/bootstrap
@@ -64,7 +64,7 @@ fi
 
 # Check for autoconf
 rm -f m4/autoconf260.m4
-case "$(autoconf --version|head -1)" in
+case "$(autoconf --version|head -n 1)" in
   *2.5[012345678]*)
     echo "Hey, your autoconf is quite old. Update it." >&2
     exit 1