booleans true and false instead. Change the prototypes of list_match(), user_match(), from_match(), and string_match() accordingly. Also use booleans internally. * src/login_nopam.c: Add brackets and parenthesis. * src/login_nopam.c: Avoid implicit conversion of pointers / integers / chars to booleans. * src/login_nopam.c: Avoid assignments in comparisons.