ncurses 5.6 - patch 20080920

+ fix shared-library rules for cygwin with tic- and tinfo-libraries.
+ fix a memory leak when failure to connect to GPM.
+ correct check for notimeout() in wgetch() (report on linux.redhat
  newsgroup by FurtiveBertie).
+ add an example warning-suppression file for valgrind,
  misc/ncurses.supp (based on example from Reuben Thomas)