Don't accept an empty string for $ALSA_CONFIG_PATH

The variable $ALSA_CONFIG_PATH specifies the config path, but the current
code accepts the empty string and results in a mysterious error because
no config file is found.

This patch fixes the check of the variable and takes the default value
if the string is empty.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/conf.c b/src/conf.c
index 32a76085..c86f819b 100644
--- a/src/conf.c
+++ b/src/conf.c
@@ -2962,7 +2962,7 @@ int snd_config_update_r(snd_config_t **_top, snd_config_update_t **_update, cons
 	configs = cfgs;
 	if (!configs) {
 		configs = getenv(ALSA_CONFIG_PATH_VAR);
-		if (!configs)
+		if (!configs || !*configs)
 			configs = ALSA_CONFIG_PATH_DEFAULT;
 	}
 	for (k = 0, c = configs; (l = strcspn(c, ": ")) > 0; ) {