ncurses 5.6 - patch 20070120

+ add _nc_leaks_tic() to separate leak-checking of tic library from
  term/ncurses libraries, and thereby eliminate a library dependency.
+ fix test/mk-test.awk to ignore blank lines.
+ correct paths in include/headers, for --srcdir (patch by Miroslav
  Lichvar).
  in a separate library (suggested by Miroslav Lichvar).