apply filter-DF to displayModesMessage

this was a bug introduced in 4d0588d
displayModesMessage was moved out of outputMessage which at the start of
the function returned when the df type was not in the filter bitset

track.c

@@ -2650,7 +2650,10 @@ struct aircraft *trackUpdateFromMessage(struct modesMessage *mm) {
  || (Modes.show_only != BADDR && (mm->addr == Modes.show_only || mm->maybe_addr == Modes.show_only))
  || (Modes.debug_7700 && ac && ac->squawk == 0x7700 && trackDataValid(&ac->squawk_valid))
  ) {
- displayModesMessage(mm);
+ // filter messages with unwanted DF types (sbs_in are unknown DF type, filter them all, this is arbitrary but no one cares anyway)
+ if (!(Modes.filterDF && (mm->sbs_in || !(Modes.filterDFbitset & (1 << mm->msgtype))))) {
+ displayModesMessage(mm);
+ }
  }
 
  if (Modes.debug_bogus) {