Make ZSTD really optional
CMake makes it appear to be optional, but in reality zstd.hpp was always unconditionally included so far.
Follow-up to 4edc1004 and e9a4322d.
Signed-off-by: Andreas Sturmlechner asturm@gentoo.org
CMake makes it appear to be optional, but in reality zstd.hpp was always unconditionally included so far.
Follow-up to 4edc1004 and e9a4322d.
Signed-off-by: Andreas Sturmlechner asturm@gentoo.org