[PATCH 1/2] t/httpd-corner.t: fix uninitialized warning

[Eric Wong <e@yhbt.net>]

Current versions of Perl don't warn when vec() is given `undef'
as its first arg, but Perl 5.10.1 does, at least.

Fixes: c7b4cbdadf3116a0 ("t/httpd-corner: improve reliability and diagnostics")
---
 t/httpd-corner.t | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/t/httpd-corner.t b/t/httpd-corner.t
index 7a6bcc66..68148655 100644
--- a/t/httpd-corner.t
+++ b/t/httpd-corner.t
@@ -296,7 +296,7 @@ my $len = length $str;
 is($len, 26, 'got the alphabet');
 my $check_self = sub {
 	my ($conn) = @_;
-	vec(my $rbits, fileno($conn), 1) = 1;
+	vec(my $rbits = '', fileno($conn), 1) = 1;
 	select($rbits, undef, undef, 30) or Carp::confess('timed out');
 	$conn->read(my $buf, 4096);
 	my ($head, $body) = split(/\r\n\r\n/, $buf, 2);