mlpdec: switch to av_assert

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/mlpdec.c

@@ -536,7 +536,7 @@ static int read_filter_params(MLPDecodeContext *m, GetBitContext *gbp,
     int i, order;
 
     // Filter is 0 for FIR, 1 for IIR.
-    assert(filter < 2);
+    av_assert0(filter < 2);
 
     if (m->filter_changed[channel][filter]++ > 1) {
         av_log(m->avctx, AV_LOG_ERROR, "Filters may change only once per access unit.\n");