+ fix several warnings from clang 3.1 --analyze, includes correcting
a null-pointer check in _nc_mvcur_resume.
+ correct display of double-width characters with MinGW port (report
by Erwin Waterlander).
+ replace MinGW's wcrtomb(), fixing a problem with _nc_viscbuf
> fixes based on Coverity report:
+ correct coloring in test/bs.c
+ correct check for 8-bit value in _nc_insert_ch().
+ remove dead code in progs/tset.c, test/linedata.h
+ add null-pointer checks in lib_tracemse.c, panel.priv.h, and some
test-programs.
+ compiler warning fixes for test programs.
+ various build-fixes for test-programs with pdcurses.
+ updated configure checks for X packages in test/configure from xterm
#267 changes.
+ add configure check to gnatmake, to accommodate cygwin.
+ add some test programs (and make these use the same special keys
by sharing linedata.h functions):
test/test_addstr.c
test/test_addwstr.c
test/test_addchstr.c
test/test_add_wchstr.c
+ correct internal _nc_insert_ch() to use _nc_insert_wch() when
inserting wide characters, since the wins_wch() function that it used
did not update the cursor position (report by Ciprian Craciun).
