tinyalsa: check NULL for config

pcm_open() was not checking config and crashed memory leak

Test: built and ran on device without errors
Change-Id: Icdd6271b0c5d6107b8bfc043f26a63b2829712b3

1 files changed, 4 insertions, 1 deletions

diff --git a/pcm.c b/pcm.c
index 120d182..4ae321b 100644
--- a/pcm.c
+++ b/pcm.c
@@ -882,8 +882,11 @@ struct pcm *pcm_open(unsigned int card, unsigned int device,
     char fn[256];
     int rc;
 
+    if (!config) {
+        return &bad_pcm; /* TODO: could support default config here */
+    }
     pcm = calloc(1, sizeof(struct pcm));
-    if (!pcm || !config)
+    if (!pcm)
         return &bad_pcm; /* TODO: could support default config here */
 
     pcm->config = *config;