ncurses 5.9 - patch 20120608

ncurses 5.9 - patch 20120608

+ fix an uninitialized variable in -c/-n logic for infocmp changes
  (cf: 20120526).
+ corrected fix for building c++ binding with clang 3.0 (report/patch
  by Richard Yao, Gentoo #417613, cf: 20110409)
+ correct configure check for working poll, fixing the case where stdin
  is redirected, e.g., in rpm/dpkg builds (Debian #676461).
+ add rpm- and dpkg-scripts, to test those build-environments.
  The resulting packages are used only for testing.