Should check these values for non-NULL before scanning.

(Closes issue #12147)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@106139 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/apps/app_talkdetect.c b/apps/app_talkdetect.c
index 0aa5e81..fb86244 100644 (file)
--- a/apps/app_talkdetect.c
+++ b/apps/app_talkdetect.c
@@ -83,11 +83,11 @@ static int background_detect_exec(struct ast_channel *chan, void *data)
        tmp = ast_strdupa(data);
        AST_STANDARD_APP_ARGS(args, tmp);
 
-       if ((sscanf(args.silence, "%d", &x) == 1) && (x > 0))
+       if (!ast_strlen_zero(args.silence) && (sscanf(args.silence, "%d", &x) == 1) && (x > 0))
                sil = x;
-       if ((sscanf(args.min, "%d", &x) == 1) && (x > 0))
+       if (!ast_strlen_zero(args.min) && (sscanf(args.min, "%d", &x) == 1) && (x > 0))
                min = x;
-       if ((sscanf(args.max, "%d", &x) == 1) && (x > 0))
+       if (!ast_strlen_zero(args.max) && (sscanf(args.max, "%d", &x) == 1) && (x > 0))
                max = x;
 
        ast_debug(1, "Preparing detect of '%s', sil=%d, min=%d, max=%d\n", args.filename, sil, min, max);