Add current_vfo to cache debug statement

src/cache.c

@@ -323,8 +323,8 @@ int rig_get_cache(RIG *rig, vfo_t vfo, freq_t *freq, int *cache_ms_freq,
             break;
 
         default:
-            rig_debug(RIG_DEBUG_WARN, "%s(%d): unknown vfo=%s\n", __func__, __LINE__,
-                      rig_strvfo(vfo));
+            rig_debug(RIG_DEBUG_WARN, "%s(%d): unknown vfo=%s, curr_vfo=%s\n", __func__, __LINE__,
+                      rig_strvfo(vfo), rig_strvfo(rig->state.current_vfo));
         }
     }