Fix dumpcaps filter printout to only show valid filters

https://github.com/Hamlib/Hamlib/issues/1151

src/rig.c

@@ -2526,9 +2526,9 @@ pbwidth_t HAMLIB_API rig_passband_normal(RIG *rig, rmode_t mode)
     }
 
     rig_debug(RIG_DEBUG_VERBOSE,
-              "%s: filter not found...return RIG_PASSBAND_NORMAL=%d\n", __func__,
-              (int)RIG_PASSBAND_NORMAL);
-    RETURNFUNC(RIG_PASSBAND_NORMAL);
+              "%s: filter not found...return %d\n", __func__,
+              0);
+    RETURNFUNC(0);
 }
 
 

tests/dumpcaps.c

@@ -720,7 +720,7 @@ int dumpcaps(RIG *rig, FILE *fout)
 
         if (pbnorm == 0)
         {
-//            continue;
+            continue;
         }
 
         sprintf_freq(freqbuf, sizeof(freqbuf), pbnorm);