[PATCH 1/3] solver: drop warnings, modernize use v5.10.1, use SEEK_SET

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

With Perl upstream preparing to deprecate things, we'll move
towards only enabling warnings during development via shebang
and stop enabling them via "use".

We'll also favor "use v5.10.1" over the Perl 5.6-compatible "use
5.010_001", since our code base never worked on 5.6.

Finally, were also importing SEEK_SET without using it, just use it
for readability since we can't avoid loading Fcntl in other
places and it'll get constant-folded, anyways.
---
 lib/PublicInbox/SolverGit.pm | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/lib/PublicInbox/SolverGit.pm b/lib/PublicInbox/SolverGit.pm
index ddf5fa16..d0cd59db 100644
--- a/lib/PublicInbox/SolverGit.pm
+++ b/lib/PublicInbox/SolverGit.pm
@@ -9,8 +9,7 @@
 # local filesystem layouts in the process.
 package PublicInbox::SolverGit;
 use strict;
-use warnings;
-use 5.010_001;
+use v5.10.1;
 use File::Temp 0.19 (); # 0.19 for ->newdir
 use Fcntl qw(SEEK_SET);
 use PublicInbox::Git qw(git_unquote git_quote);
@@ -271,7 +270,7 @@ sub prepare_index ($) {
 	my $in = tmpfile("update-index.$oid_full") or die "tmpfile: $!";
 	print $in "$mode_a $oid_full\t$path_a\0" or die "print: $!";
 	$in->flush or die "flush: $!";
-	sysseek($in, 0, 0) or die "seek: $!";
+	sysseek($in, 0, SEEK_SET) or die "seek: $!";
 
 	dbg($self, 'preparing index');
 	my $rdr = { 0 => $in };