test for /boot/vmlinuz-$release existence before using it

kernel orphaning assumes this file is present, however in rare cases
when the user erased its running kernel (or in chroots), the file may
not exist which causes an error message

1 files changed, 1 insertions, 1 deletions

diff --git a/urpm/orphans.pm b/urpm/orphans.pm
index 9b41bd5e..7a3b0eab 100644
--- a/urpm/orphans.pm
+++ b/urpm/orphans.pm
@@ -296,7 +296,7 @@ sub _will_prop_still_be_needed {
 sub _get_current_kernel_package() {
     my $release = (POSIX::uname())[2];
     # --qf '%{name}' is used in order to provide the right format:
-    `rpm -qf --qf '%{name}' /boot/vmlinuz-$release`;
+    -e "/boot/vmlinuz-$release" && `rpm -qf --qf '%{name}' /boot/vmlinuz-$release`;
 }