In rig.c reduce tx_range from ERR to VERBOSE -- it's not fatal at all

Was causing problems with powershell execution detecting the error condition

src/rig.c

@@ -498,7 +498,7 @@ RIG *HAMLIB_API rig_init(rig_model_t rig_model)
 
     if (rs->tx_range_list[0].startf == 0)
     {
-        rig_debug(RIG_DEBUG_ERR, "%s: rig does not have tx_range!!\n", __func__);
+        rig_debug(RIG_DEBUG_VERBOSE, "%s: rig does not have tx_range!!\n", __func__);
         //return(NULL); // this is not fatal
     }