commit 203489a33 ("checkpatch: add --types option
to report only specific message types") uses a
perl syntax introduced in perl version 5.14.

Use the backward compatible perl syntax instead.

Reported-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Joe Perches <joe@perches.com>
---
 scripts/checkpatch.pl | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 3ba2db6..51ee331 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -174,9 +174,9 @@ sub hash_save_array_words {
 sub hash_show_words {
 	my ($hashRef, $prefix) = @_;
 
-	if ($quiet == 0 && keys $hashRef) {
+	if ($quiet == 0 && keys %{$hashRef}) {
 		print "NOTE: $prefix message types:";
-		foreach my $word (sort keys $hashRef) {
+		foreach my $word (sort keys %{$hashRef}) {
 			print " $word";
 		}
 		print "\n\n";