Fix segfault with downsampling

Fix segfault in the initialization for downsampling.

diff --git a/src/pcm/pcm_rate.c b/src/pcm/pcm_rate.c
index 84cfb0b11cc47a8792271ce15ac5991978516d62..209e7003411efa889307f90697dde978186a7798 100644 (file)
--- a/src/pcm/pcm_rate.c
+++ b/src/pcm/pcm_rate.c
@@ -751,7 +751,8 @@ static int snd_pcm_rate_init(snd_pcm_t *pcm)
        switch (rate->type) {
        case RATE_TYPE_LINEAR:
                /* for expand */
-               memset(rate->old_sample, 0, sizeof(*rate->old_sample) * pcm->channels);
+               if (rate->old_sample)
+                       memset(rate->old_sample, 0, sizeof(*rate->old_sample) * pcm->channels);
                break;
        default:
                assert(0);