[PATCH 2/5] initialize scalar for `vec' perlop modification

[Eric Wong <e@80x24.org>]

From: Eric Wong <e@yhbt.net>

Older Perls (tested 5.16.3) would warn on uninitialized scalars while
newer (tested 5.28.1) do not.  Just initialize it to an empty string
since it'll be filled in by `vec'.
---
 lib/PublicInbox/LEI.pm     | 2 +-
 lib/PublicInbox/Syscall.pm | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/PublicInbox/LEI.pm b/lib/PublicInbox/LEI.pm
index 1f4a3082..2784ca6b 100644
--- a/lib/PublicInbox/LEI.pm
+++ b/lib/PublicInbox/LEI.pm
@@ -670,7 +670,7 @@ sub accept_dispatch { # Listener {post_accept} callback
 	my ($sock) = @_; # ignore other
 	$sock->autoflush(1);
 	my $self = bless { sock => $sock }, __PACKAGE__;
-	vec(my $rvec, fileno($sock), 1) = 1;
+	vec(my $rvec = '', fileno($sock), 1) = 1;
 	select($rvec, undef, undef, 1) or
 		return send($sock, 'timed out waiting to recv FDs', MSG_EOR);
 	my @fds = $recv_cmd->($sock, my $buf, 4096 * 33); # >MAX_ARG_STRLEN
diff --git a/lib/PublicInbox/Syscall.pm b/lib/PublicInbox/Syscall.pm
index a1f53235..5ff1d65f 100644
--- a/lib/PublicInbox/Syscall.pm
+++ b/lib/PublicInbox/Syscall.pm
@@ -224,7 +224,7 @@ sub epoll_ctl_mod8 {
 # epoll_wait wrapper
 # ARGS: (epfd, maxevents, timeout (milliseconds), arrayref)
 #  arrayref: values modified to be [$fd, $event]
-our $epoll_wait_events;
+our $epoll_wait_events = '';
 our $epoll_wait_size = 0;
 sub epoll_wait_mod4 {
 	my ($epfd, $maxevents, $timeout_msec, $events) = @_;