+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).
+