If icom.c rig_get_freq is called and VFO is None then VFO gets set to the requexted VFO

https://github.com/Hamlib/Hamlib/issues/231

rigs/icom/icom.c

@@ -1095,6 +1095,13 @@ int icom_get_freq(RIG *rig, vfo_t vfo, freq_t *freq)
     rig_debug(RIG_DEBUG_VERBOSE, "%s: using vfo=%s\n", __func__,
               rig_strvfo(vfo));
 
+    if (priv->curr_vfo == RIG_VFO_NONE) {
+        retval = rig_set_vfo(rig, vfo);
+        if (retval != RIG_OK) {
+            rig_debug(RIG_DEBUG_ERR, "%s: set_vfo failed? retval=%s\n", __func__, strerror(retval));
+        }
+    }
+
     retval = icom_transaction(rig, cmd, subcmd, NULL, 0, freqbuf, &freq_len);
 
     if (retval != RIG_OK)

rigs/icom/icom.h

@@ -30,7 +30,7 @@
 #include <sys/time.h>
 #endif
 
-#define BACKEND_VER "20200426"
+#define BACKEND_VER "20200501"
 
 /*
  * defines used by comp_cal_str in rig.c