smb_mem_zalloc
oembuf = smb_mem_zalloc(oemlen + 1);
wcsbuf = smb_mem_zalloc(wcsbytes + 2);
void *smb_mem_zalloc(size_t);
#define MEM_ZALLOC(AREA, SIZE) smb_mem_zalloc(SIZE)
void *smb_mem_zalloc(size_t);