ncurses 5.9 - patch 20130119

ncurses 5.9 - patch 20130119

+ fixes for issues found by Coverity:
  + fix memory leak in safe_sprintf.c
  + add check for return-value in tty_update.c
  + correct initialization for -s option in test/view.c
  + add check for numeric overflow in lib_instr.c
  + improve error-checking in copywin
+ add advice in infocmp manpage for termcap users (Debian #698469).
+ add "-y" option to test/demo_termcap and test/demo_terminfo to
  demonstrate behavior with/without extended capabilities.
+ updated termcap manpage to document legacy termcap behavior for
  matching capability names.
+ modify name-comparison for tgetstr, etc., to accommodate legacy
  applications as well as to improve compatbility with BSD 4.2
  termcap implementations (Debian #698299) (cf: 980725).