compatiblity to old and new db files

diff --git a/tools/merge_serial_address.pl b/tools/merge_serial_address.pl
index bf6e053384222b5e16b6784474932df62d8d6c12..7ed3f2cf85c450be2c65ebb4a8c35be1274a7ba7 100755 (executable)
--- a/tools/merge_serial_address.pl
+++ b/tools/merge_serial_address.pl
@@ -37,7 +37,7 @@ foreach my $cur_ln (<$fh2>) {
     next if (!defined $serial_nr);
     $trb{$serial_nr}->{'address'} = hex($address);
     $trb{$serial_nr}->{'endpoint_nr'} = $sernr2;
-    $trb{$serial_nr}->{'uid'} = $trb{int($sernr1)}->{'uid'};
+    $trb{$serial_nr}->{'uid'} = $trb{int($sernr1)}->{'uid'} unless $trb{$serial_nr}->{'uid'};  #compat. to old db files
 }