Build unix versions with libncursesw (fix)

GNUmakef.def

@@ -114,6 +114,7 @@ PLATFORM=lnx
 EXEEXT=
 OBJEXT=.o
 LIBEXT=.a
+CFLAGS+=-I/usr/include/ncursesw/
 endif
 endif
 endif

docs/building.txt

@@ -50,7 +50,7 @@ GNUmakef.def.
 
 -- unix-like ONLY --
 When building in Linux, FreeBSD or another unix-like OS if you wants use
-unicode-compatible Golded+ then build Golded+ using ncurses v.5.4 with
+unicode-compatible Golded+ then build Golded+ using ncurses v.5.x with
 libncursesw. (This issue is suggested by Dmitry Rodin 2:5020/5410@fidonet.)
 ------ COMMON ------