Fix icom default filter settings

https://github.com/Hamlib/Hamlib/issues/471

rigs/icom/frame.c

@@ -297,6 +297,10 @@ int icom_transaction(RIG *rig, int cmd, int subcmd,
 {
     int retval, retry;
 
+    rig_debug(RIG_DEBUG_VERBOSE,
+              "%s: cmd=0x%02x, subcmd=0x%02x, payload_len=%d, data_len=%d\n", __func__,
+              cmd, subcmd, payload_len, *data_len);
+
     retry = rig->state.rigport.retry;
 
     do

rigs/icom/icom.c

@@ -1631,11 +1631,11 @@ int icom_set_mode_with_data(RIG *rig, vfo_t vfo, rmode_t mode,
 
         if (width != RIG_PASSBAND_NOCHANGE)
         {
-            if (filter_byte)   // then we need the width byte too
+            unsigned char mode_icom; // not usb as it will map to USB/LSB
+            signed char width_icom;
+            rig2icom_mode(rig, vfo, mode, width, &mode_icom, &width_icom);
+            if (filter_byte && width_icom != -1)   // then we need the width byte too
             {
-                unsigned char mode_icom; // not used as it will map to USB/LSB
-                signed char width_icom;
-                rig2icom_mode(rig, vfo, mode, width, &mode_icom, &width_icom);
                 // since width_icom is 0-2 for rigs that need this here we have to make it 1-3
                 datamode[1] = datamode[0] ? width_icom : 0;
                 retval =

rigs/icom/icom.h

@@ -30,7 +30,7 @@
 #include <sys/time.h>
 #endif
 
-#define BACKEND_VER "20201216"
+#define BACKEND_VER "20201219"
 
 /*
  * defines used by comp_cal_str in rig.c

src/rig.c

@@ -1941,10 +1941,12 @@ pbwidth_t HAMLIB_API rig_passband_normal(RIG *rig, rmode_t mode)
     {
         if (rs->filters[i].modes & mode)
         {
+            rig_debug(RIG_DEBUG_VERBOSE, "%s: return filter#%d, width=%d\n", __func__, i, (int)rs->filters[i].width);
             return rs->filters[i].width;
         }
     }
 
+    rig_debug(RIG_DEBUG_VERBOSE, "%s: filter not found...return RIG_PASSBAND_NORMAL=%d\n", __func__, (int)RIG_PASSBAND_NORMAL);
     return RIG_PASSBAND_NORMAL;
 }