Wrong usage of ATOMIC_INT_LOCK_FREE

According to https://en.cppreference.com/w/c/atomic/ATOMIC_LOCK_FREE_consts the ATOMIC_INT_LOCK_FREE can have three different values:

Value	Explanation
0	The atomic type is never lock-free
1	The atomic type is sometimes lock-free
2	The atomic type is always lock-free

Therefore using defined(ATOMIC_INT_LOCK_FREE) doesn't lead to desired result as it is defined even if the int isn't really lock free.