Speed up rig_band_changed actions for FT991 and perhaps others

Putting the AC001; command immediately after FA freq change make the band change end state occur immediately

src/rig.c

@@ -1977,6 +1977,7 @@ int rig_set_freq(RIG *rig, vfo_t vfo, freq_t freq)
     vfo_t vfo_save;
     static int last_band = -1;
     int curr_band;
+    int band_changing = 0;
 
     if (CHECK_RIG_ARG(rig))
     {
@@ -1990,7 +1991,8 @@ int rig_set_freq(RIG *rig, vfo_t vfo, freq_t freq)
     {
         rig_debug(RIG_DEBUG_VERBOSE, "%s: band changing to %s\n", __func__,
                   rig_get_band_str(rig, curr_band, 0));
-        rig_band_changed(rig, curr_band);
+        band_changing = 1;
+        //rig_band_changed(rig, curr_band);
         last_band = curr_band;
     }
 
@@ -2117,8 +2119,13 @@ int rig_set_freq(RIG *rig, vfo_t vfo, freq_t freq)
 
         do
         {
-            HAMLIB_TRACE;
             retcode = caps->set_freq(rig, vfo, freq);
+
+            if (band_changing)
+            {
+                rig_band_changed(rig, curr_band);
+            }
+
             // disabling the freq check as of 2023-06-02
             // seems unnecessary and slows down rigs unnecessarily
             tfreq = freq;
@@ -2207,6 +2214,9 @@ int rig_set_freq(RIG *rig, vfo_t vfo, freq_t freq)
         }
 
         HAMLIB_TRACE;
+
+        if (band_changing) { rig_band_changed(rig, curr_band); }
+
         retcode = caps->set_freq(rig, vfo, freq);
     }
 
@@ -4521,10 +4531,8 @@ int HAMLIB_API rig_set_split_freq(RIG *rig, vfo_t vfo, freq_t tx_freq)
     {
         tx_vfo = rig->state.tx_vfo;
     }
-    else
-    {
-        tx_vfo = vfo_fixup(rig, vfo, rig->state.cache.split);
-    }
+
+    tx_vfo = vfo_fixup(rig, tx_vfo, rig->state.cache.split);
 
     rig_get_freq(rig, tx_vfo, &tfreq);
 
@@ -8652,16 +8660,20 @@ int morse_data_handler_set_keyspd(RIG *rig, int keyspd)
  */
 HAMLIB_EXPORT(void *) rig_data_pointer(RIG *rig, rig_ptrx_t idx)
 {
-  switch(idx)
+    switch (idx)
     {
     case RIG_PTRX_RIGPORT:
         return RIGPORT(rig);
+
     case RIG_PTRX_PTTPORT:
         return PTTPORT(rig);
+
     case RIG_PTRX_DCDPORT:
         return DCDPORT(rig);
+
     case RIG_PTRX_CACHE:
         return CACHE(rig);
+
     default:
         rig_debug(RIG_DEBUG_ERR, "%s: Invalid data index=%d\n", __func__, idx);
         return NULL;