ncurses 5.7 - patch 20091212

ncurses 5.7 - patch 20091212

+ correct transfer of multicolumn characters in multirow
  field_buffer(), which stopped at the end of the first row due to
  filling of unused entries in a cchar_t array with nulls.
+ updated nsterm* entries (Benjamin Sittler, Emanuele Giaquinta)
+ modify _nc_viscbuf2() and _tracecchar_t2() to show wide-character
  nulls.
+ use strdup() in set_menu_mark(), restore .marklen struct member on
  failure.
+ eliminate clause 3 from the UCB copyrights in read_termcap.c and
  tset.c per
	ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change
  (patch by Nicholas Marriott).
+ replace a malloc in tic.c with strdup, checking for failure (patch by
  Nicholas Marriott).
+ update config.guess, config.sub from
	http://savannah.gnu.org/projects/config