Upgrade Opus to v1.1.3
diff --git a/celt/celt_lpc.c b/celt/celt_lpc.c
index f02145a..b410a21 100644
--- a/celt/celt_lpc.c
+++ b/celt/celt_lpc.c
@@ -49,8 +49,7 @@
    float *lpc = _lpc;
 #endif
 
-   for (i = 0; i < p; i++)
-      lpc[i] = 0;
+   OPUS_CLEAR(lpc, p);
    if (ac[0] != 0)
    {
       for (i = 0; i < p; i++) {