fix : file size and modification time not updated

this also caused mp3 files without VBR header and which size has changed
since its addition to the library to always be "full-scanned"

gmusicbrowser_songs.pm

@@ -1140,9 +1140,10 @@ sub ReReadFile
		my $checklength= ($size1!=$size2 || ($force && $force==2)) ? 2 : 0;
		return 1 unless $checklength || $force || $modif1!=$modif2;
		my ($values,$estimated)=FileTag::Read($file,$checklength);
		$values->{size}=$size2;
		$values->{modif}=$modif2;
		my @changed=$DIFFsub->($ID,$values);
		return unless @changed;warn "Changed fields : @changed";
		############SetDB($ID,map( ($_,$values->{$_}), @changed)); DELME
		::SongsChanged([$ID],\@changed);
		my %changed; $changed{$_}=undef for @changed;
		Changed(\%changed,[$ID]);