dsdeflate: shorten scope of initial buffer

There's no need to keep the initial buffer alive in package-wide
scope once it's replaced by `$next' in ->write or ->zflush.

diff --git a/lib/PublicInbox/DSdeflate.pm b/lib/PublicInbox/DSdeflate.pm
index b5208e4368abd63626cf617eda1bd4ba4f00fb08..bf0ecd3877c79295ed99c90c0e2f750f730b6bfe 100644 (file)
--- a/lib/PublicInbox/DSdeflate.pm
+++ b/lib/PublicInbox/DSdeflate.pm
@@ -27,10 +27,10 @@ my %IN_OPT = (
 );
 
 # global deflate context and buffer
 );
 
 # global deflate context and buffer

-my $zbuf = \(my $buf = '');
-my $zout;
+my ($zout, $zbuf);

 {
        my $err;
 {
        my $err;

+       $zbuf = \(my $initial = ''); # replaced by $next in zflush/write

        ($zout, $err) = Compress::Raw::Zlib::Deflate->new(
                # nnrpd (INN) and Compress::Raw::Zlib favor MemLevel=9,
                # the zlib C library and git use MemLevel=8 as the default
        ($zout, $err) = Compress::Raw::Zlib::Deflate->new(
                # nnrpd (INN) and Compress::Raw::Zlib favor MemLevel=9,
                # the zlib C library and git use MemLevel=8 as the default