false memory leak report on mmap call

[Tzafrir]

analyzing the following file with --std-posix report false error on the
return statement.
Seems like cppcheck fails detecting that mmap failed and no memory was
allocated in this case

include <sys mman.h=""></sys>

uint8_t mmap_mem_leak_error()
{
void data = mmap(NULL, 10, PROT_READ, MAP_PRIVATE, 1, 0);
if (data != MAP_FAILED)
return data;
return NULL;
}

[versat]

Thanks for reporting that issue.
I have reopened and updated a ticket describing it:
https://trac.cppcheck.net/ticket/8327