GNUmifluz: P_32_COPY

{ \
 ((u_int8_t *)b)[0] = ((u_int8_t *)a)[0]; \
 ((u_int8_t *)b)[1] = ((u_int8_t *)a)[1]; \
 ((u_int8_t *)b)[2] = ((u_int8_t *)a)[2]; \
 ((u_int8_t *)b)[3] = ((u_int8_t *)a)[3]; \
}