another threads reliability fix: serialize writes to thr->threadsv

avoid most uses of PL_na (which is much more inefficient than a
simple local); update docs to suit; PL_na now being thr->Tna may
be a minor compatibility issue for extensions--will require dTHR
outside of XSUBs (those get automatic dTHR)

p4raw-id: //depot/perl@2387

1 files changed, 1 insertions, 1 deletions

diff --git a/t/op/pwent.t b/t/op/pwent.t
index 1365588004..4316b17028 100755
--- a/t/op/pwent.t
+++ b/t/op/pwent.t
@@ -78,7 +78,7 @@ foreach (sort keys %seen) {
     if ($times > 1) {
 	# Multiply defined users are rarely intentional.
 	local $" = ", ";
-	warn "# User '$_' defined multiple times in $where, lines: @{$seen{$_}}.\n";
+	print "# User '$_' defined multiple times in $where, lines: @{$seen{$_}}.\n";
 	delete $suspect{$_};
     }
 }