ncurses 5.9 - patch 20121117

> fixes based on Coverity report:
+ add missing braces around FreeAndNull in two places.
+ various fixes in test/ncurses.c
+ improve limit-checks in tinfo/make_hash.c, tinfo/read_entry.c
+ correct malloc size in progs/infocmp.c
+ guard against negative array indices in test/knight.c
+ fix off-by-one limit check in test/color_name.h
+ add null-pointer check in progs/tabs.c, test/bs.c, test/demo_forms.c,
  test/inchs.c
+ fix memory-leak in tinfo/lib_setup.c, progs/toe.c,
  test/clip_printw.c, test/demo_menus.c
+ delete unused windows in test/chgat.c, test/clip_printw.c,
  test/insdelln.c, test/newdemo.c on error-return.