Fix an integer wraparound issue.

diff --git a/mixer.cpp b/mixer.cpp
index 2802329b136c60c69b9f760ce812150bb7fa49a7..84335aa7f39be226750a013e58d0bf7736a27554 100644 (file)
--- a/mixer.cpp
+++ b/mixer.cpp
@@ -123,7 +123,7 @@ void QueueLengthPolicy::update_policy(int queue_length)
                return;
        }
        if (queue_length > 0) {
-               if (++frames_with_at_least_one >= 50) {
+               if (++frames_with_at_least_one >= 50 && safe_queue_length > 0) {
                        --safe_queue_length;
                        fprintf(stderr, "Card %u: Spare frames for more than 50 frames, reducing safe limit to %u frames\n",
                                card_index, safe_queue_length);