rtpdec: Remove unnecessary checks

The free function of a depacketizer won't be called if data is NULL.
Signed-off-by: Martin Storsjö <martin@martin.st>

libavformat/rtpdec_h263_rfc2190.c

@@ -41,8 +41,6 @@ struct PayloadContext {
 
 static void h263_free_context(PayloadContext *data)
 {
-    if (!data)
-        return;
     if (data->buf) {
         uint8_t *p;
         avio_close_dyn_buf(data->buf, &p);

libavformat/rtpdec_latm.c

@@ -33,8 +33,6 @@ struct PayloadContext {
 
 static void latm_free_context(PayloadContext *data)
 {
-    if (!data)
-        return;
     if (data->dyn_buf) {
         uint8_t *p;
         avio_close_dyn_buf(data->dyn_buf, &p);