message: Rename DEFAULT_VCACHE_SIZE to VCACHE_SIZE
  We don't use default arguments anymore so "default" is a misnomer;
  instead this constant is just a recommendation.
diff: #define MESHOPTIMIZER_API
  #endif
  -/* Default vertex cache size */
  -#define MESHOPTIMIZER_DEFAULT_VCACHE_SIZE 16
  +/* Recommended vertex cache size; it provides a reasonable balance between performance on different GPUs */
  +#define MESHOPTIMIZER_VCACHE_SIZE 16
  /* Index buffer codec version */
  #define MESHOPTIMIZER_INDEX_CODEC_VERSION 1
  