ncurses 5.9 - patch 20120804

ncurses 5.9 - patch 20120804

+ update test/configure, adding check for tinfo library.
+ improve limit-checks for the getch fifo (report by Werner Fink).
+ fix a remaining mismatch between $with_echo and the symbols updated
  by CF_DISABLE_ECHO affecting parameters for mk-2nd.awk (report by
  Sven Joachim, cf:  20120317).
+ modify followup check for pkg-config's library directory in the
  --enable-pc-files option to validate syntax (report by Sven Joachim,
  cf: 20110716).