ncurses 5.9 - patch 20130413

ncurses 5.9 - patch 20130413

+ add MinGW to cases where ncurses installs by default into /usr
  (prompted by discussion with Daniel Silva Ferreira).
+ add -D option to infocmp's usage-message (patch by Miroslav Lichvar).
+ add a missing 'int' type for main function in configure check for
  type of bool variable, to work with clang 3.2 (report by Dmitri
  Gribenko).
+ improve configure check for static_cast, to work with clang 3.2
  (report by Dmitri Gribenko).
+ re-order rule for demo.o and macros defining header dependencies in
  c++/Makefile.in to accommodate gmake (report by Dmitri Gribenko).