message: spatial: Make a non-static function inline
  This cleans up default symbol table.
diff: @@ -11,7 +11,7 @@ namespace meshopt
  {
  // "Insert" two 0 bits after each of the 10 low bits of x
  -unsigned int part1By2(unsigned int x)
  +inline unsigned int part1By2(unsigned int x)
  {
  x &= 0x000003ff; // x = ---- ---- ---- ---- ---- --98 7654 3210
  x = (x ^ (x << 16)) & 0xff0000ff; // x = ---- --98 ---- ---- ---- ---- 7654 3210
  