func CompressHC(in, out []byte) (int, error) {
	return CompressHCLevel(in, out, 0)
}
CompressHC compresses in and puts the content in out. len(out)
should have enough space for the compressed data (use CompressBound
to calculate). Returns the number of bytes in the out slice. Determines
the compression level automatically.
package lz4
import "C"
import (
	"fmt"
)