message: indexcodec: Assert validity of codeaux_table
  While this is technically allowed by the bitstream, decoder currently
  assumes that codeaux table does not have 0xf nibbles to make them a bit
  faster to process.
diff: @@ -294,6 +294,9 @@ size_t meshopt_encodeIndexBuffer(unsigned char* buffer, size_t buffer_size, cons
  // this is enough space for aux byte + 5 bytes per varint index which is the absolute worst case for any input
  for (size_t i = 0; i < 16; ++i)
  {
  + // decoder assumes that table entries never refer to separately encoded indices
  + assert((codeaux_table[i] & 0xf) != 0xf && (codeaux_table[i] >> 4) != 0xf);
  +
  *data++ = codeaux_table[i];
  }
  