Also no longer let getc()/putc() point to libio functions directly (they
were even only macros there, too...).
Should now be backwards compatible, too. Thanks to Waldemar for pointing this out!
git-svn-id: file:///srv/svn/repos/haiku/trunk/current@8894 a95241bf-73f2-0310-859d-f6bbb57e9c96