md5-x86_64.pl: work around warning.

Reviewed-by: NRich Salz <rsalz@openssl.org>

crypto/md5/asm/md5-x86_64.pl

@@ -116,6 +116,7 @@ sub round4_step
 EOF
 }
 
+no warnings qw(uninitialized);
 my $flavour = shift;
 my $output  = shift;
 if ($flavour =~ /\./) { $output = $flavour; undef $flavour; }
@@ -127,7 +128,6 @@ $0 =~ m/(.*[\/\\])[^\/\\]+$/; my $dir=$1; my $xlate;
 ( $xlate="${dir}../../perlasm/x86_64-xlate.pl" and -f $xlate) or
 die "can't locate x86_64-xlate.pl";
 
-no warnings qw(uninitialized);
 open OUT,"| \"$^X\" $xlate $flavour $output";
 *STDOUT=*OUT;