toplevel-find: fix perl warning

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/toplevel-find b/toplevel-find
index 35f73e6b9d7f060b118e89757946e0030b1e5f2b..c9174c9842530d48f4d1e73e409b9646eb1f0997 100755 (executable)
--- a/toplevel-find
+++ b/toplevel-find
@@ -6,6 +6,7 @@ use IO::File;
 my $base = $ARGV[0];
 $base =~ m/^\-/ and die;
 
+sub read_file ($);
 sub read_file ($) {
   my ($fn) = @_;
   my $f = new IO::File "$fn", '<' or die "$fn $!";