Tests/Preprocess: Fix for CMAKE_BUILD_TYPE=None and CFLAGS=-DNDEBUG
Fix for:
cd /path/to/src/cmake &&
rm -rf build &&
mkdir build &&
CFLAGS=-DNDEBUG cmake -DCMAKE_BUILD_TYPE=None -GNinja .. &&
ninja &&
ctest -R Preprocess
Edited by Đoàn Trần Công Danh