realloc

[Gregg Townsend]

realloc() is sometimes used to grow a list of objects as entries are added. 
If it's to be used with an initially empty list, realloc() must accept a null
pointer as its frist argument -- because ANSI C allows malloc() to return NULL
in response to a request of size zero!

    Gregg Townsend / Computer Science Dept / Univ of Arizona / Tucson, AZ 85721
    +1 602 621 4325      gmt at Arizona.EDU       110 57 16 W / 32 13 45 N / +758m