Change ptt check in newcat.c set_freq to check ptt only for affected rigs

https://github.com/Hamlib/Hamlib/issues/540

rigs/yaesu/newcat.c

@@ -787,20 +787,17 @@ int newcat_set_freq(RIG *rig, vfo_t vfo, freq_t freq)
         if (vfo != rig->state.tx_vfo) return -RIG_ENTARGET;
     }
 
-    ptt_t ptt;
-    if (RIG_OK != (err = newcat_get_ptt(rig, vfo, &ptt)))
+    if (is_ftdx3000 || is_ftdx5000)
     {
-        ERRMSG(err, "newcat_set_cmd failed");
-        RETURNFUNC(err);
-    }
+        // we have a few rigs that can't set freq while PTT_ON
+        ptt_t ptt;
+        if (RIG_OK != (err = newcat_get_ptt(rig, vfo, &ptt)))
+        {
+            ERRMSG(err, "newcat_set_cmd failed");
+            RETURNFUNC(err);
+        }
 
-    if (ptt == RIG_PTT_ON) // we have a few rigs that can't set TX VFO while PTT_ON
-    {
-        // should be true whether we're on VFOA or VFOB but only restricting VFOB right now
-        // we return RIG_OK as we dont' want
-        if (is_ftdx3000) { return RIG_ENTARGET; }
-
-        if (is_ftdx5000) { return RIG_ENTARGET; }
+        if (ptt) { return RIG_ENTARGET; }
     }
 
     if (RIG_MODEL_FT450 == caps->rig_model)

src/rig.c

@@ -1839,6 +1839,30 @@ int HAMLIB_API rig_get_freq(RIG *rig, vfo_t vfo, freq_t *freq)
     RETURNFUNC(retcode);
 }
 
+/**
+ * \brief get the frequency of VFOA and VFOB
+ * \param rig   The rig handle
+ * \param freqA  The location where to store the VFOA/Main frequency
+ * \param freqB  The location where to store the VFOB/Sub frequency
+ *
+ *  Retrieves the frequency of  VFOA/Main and VFOB/Sub
+ *  The value stored at \a freq location equals RIG_FREQ_NONE when the current
+ *  frequency of the VFO is not defined (e.g. blank memory).
+ *
+ * \RETURNFUNC(RIG_OK) if the operation has been successful, otherwise
+ * a negative value if an error occurred (in which case, cause is
+ * set appropriately).
+ *
+ * \sa rig_set_freq()
+ */
+int HAMLIB_API rig_get_freqs(RIG *rig, freq_t *freqA, freq_t freqB)
+{
+    // we will attempt to avoid vfo swapping in this routine
+
+    return -RIG_ENIMPL;
+
+}
+
 
 /**
  * \brief set the mode of the target VFO