casereader_create_arithmetic_sequence (struct casereader *subreader,
double first, double increment)
{
- struct arithmetic_sequence *as = xzalloc (sizeof *as);
+ struct arithmetic_sequence *as = XZALLOC (struct arithmetic_sequence);
as->first = first;
as->increment = increment;
return casereader_create_append_numeric (subreader, next_arithmetic,