Merge pull request #165 in FS/freeswitch from…

Merge pull request #165 in FS/freeswitch from ~MBRANCA/freeswitch:bugfix/FS-7197-libpri-spans-fails-to-stop-when-unloading to master

* commit 'e062f5e3':
  If the span has been already fully stopped and ftdm is not running, return success from the span stop function.

libs/freetdm/src/ftmod/ftmod_libpri/ftmod_libpri.c

@@ -2709,7 +2709,8 @@ static ftdm_status_t ftdm_libpri_stop(ftdm_span_t *span)
 	ftdm_libpri_data_t *isdn_data = span->signal_data;
 
 	if (!ftdm_test_flag(isdn_data, FTMOD_LIBPRI_RUNNING)) {
-		return FTDM_FAIL;
+		ftdm_log(FTDM_LOG_DEBUG, "Span %d already stopped, continuing anyway...\n", ftdm_span_get_id(span));
+		return FTDM_SUCCESS;
 	}
 
 	ftdm_log(FTDM_LOG_INFO, "Stopping span [s%d][%s]\n",