Fix -Wexpansion-to-defined warning from Clang 3.9
Fixed:
/home/kfunk/devel/src/kf5/heaptrack/tests/manual/test.cpp:65:5: warning: macro expansion producing 'defined' has undefined behavior [-Wexpansion-to-defined] #if HAVE_ALIGNED_ALLOC ^ /home/kfunk/devel/src/kf5/heaptrack/tests/manual/test.cpp:4:28: note: expanded from macro 'HAVE_ALIGNED_ALLOC' #define HAVE_ALIGNED_ALLOC defined(_ISOC11_SOURCE)