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Increase alignment of the internal state structures to sizeof(void *) from 4 bytes.

OpusCustomMode begins with a pointer and was getting misaligned on 64 bit arches.

--- a/src/opus_private.h

+++ b/src/opus_private.h

@@ -74,11 +74,10 @@

 int opus_decode_native(OpusDecoder *st, const unsigned char *data, opus_int32 len,

       opus_val16 *pcm, int frame_size, int decode_fec, int self_delimited, int *packet_offset);

-/* Make sure everything's aligned to 4 bytes (this may need to be increased

-   on really weird architectures) */

+/* Make sure everything's aligned to sizeof(void *) bytes */

 static inline int align(int i)

 {

-    return (i+3)&-4;

+    return (i+sizeof(void *)-1)&-sizeof(void *);

 }

 opus_int32 opus_repacketizer_out_range_impl(OpusRepacketizer *rp, int begin, int end, unsigned char *data, opus_int32 maxlen, int self_delimited);