ucm: return empty string for undefined "open" variables (arguments)

Signed-off-by: Jaroslav Kysela <perex@perex.cz>

diff --git a/src/ucm/ucm_subs.c b/src/ucm/ucm_subs.c
index a7d79430cadd1fe09ac925e798db6c158fb78e7f..7bf0aaae633ebe3f294421ab46635fd4623e55df 100644 (file)
--- a/src/ucm/ucm_subs.c
+++ b/src/ucm/ucm_subs.c
@@ -559,6 +559,8 @@ static char *rval_var(snd_use_case_mgr_t *uc_mgr, const char *id)
        if (id[0] == '-') {
                ignore_not_found = true;
                id++;
+       } else if (id[0] == '@') {
+               ignore_not_found = true;
        }
        v = uc_mgr_get_variable(uc_mgr, id);
        if (v == NULL && ignore_not_found)