How often does this happen?
for(ptr=head; ptr->next; ptr++);
{
printf("Hello!");
}
It makes sense to warn about that. If the programmer intended for it to be for->semicolon->blockofcode, they could do this:
for(ptr=head; ptr->next; ptr++) {}
{
printf("Hello!");
}
However, obviously no warning should be shown for this:
for(ptr=head; ptr->next; ptr++);
printf("Hello!");
or this
for(ptr=head; ptr->next; ptr++) printf("Hello!");
and only maybe this
for(ptr=head; ptr->next; ptr++) printf("hi");
{
printf("Hello!");
}