message: vcacheanalyzer: Minor refactoring
  Remove redundant empty namespace
diff: #include <vector>
  -namespace meshopt
  -{
  -
  -}
  -
  meshopt_VertexCacheStatistics meshopt_analyzeVertexCache(const unsigned int* indices, size_t index_count, size_t vertex_count, unsigned int cache_size, unsigned int warp_size, unsigned int buffer_size)
  {
  assert(index_count % 3 == 0);
  