appliance: Fix code which gets list of kernels.

The first 'ls' command was failing, so the second 'ls' command
would never run at all.

diff --git a/appliance/libguestfs-supermin-helper.in b/appliance/libguestfs-supermin-helper.in
index 4d8fd04..ab3aad5 100755 (executable)
--- a/appliance/libguestfs-supermin-helper.in
+++ b/appliance/libguestfs-supermin-helper.in
@@ -38,7 +38,10 @@ initrd="$3"
 # without arch second.
 
 arch=$(echo "@host_cpu@" | sed 's/^i.86$/i?86/')
-kernels=$(ls -1dvr /boot/vmlinuz-*.$arch* 2>/dev/null | grep -v xen; ls -1dvr /boot/vmlinuz-* 2>/dev/null | grep -v xen)
+kernels=$(
+    ls -1dvr /boot/vmlinuz-*.$arch* 2>/dev/null | grep -v xen ||: ;
+    ls -1dvr /boot/vmlinuz-* 2>/dev/null | grep -v xen
+)
 
 if [ -z "$kernels" ]; then
     echo "$0: failed to find a suitable kernel in /boot directory" >&2