VOID(...) define

[Osyotr]

C language, in opposite to C++, supports implicit cast to void*, so there is no need in such casts.

[MaxGavr]

-Wall does it's work: my compiler strongly recommends to do all pointer casts explicit.
I believe -Wno-incompatible-pointer-types would suppress such warnings.

[Osyotr]

GCC 5.1
C11 enabled
-Wall
No warnings after removing casts.