pull curses.h out of internal.h

src/lib/banner.c

@@ -1,4 +1,5 @@
 #include "internal.h"
+#include <curses.h>
 #ifdef USE_DEFLATE
 #include <libdeflate.h>
 #endif

src/lib/internal.h

@@ -22,7 +22,6 @@ extern "C" {
 // KEY_EVENT is defined by both ncurses.h (prior to 6.3) and wincon.h. since we
 // don't use either definition, kill it before inclusion of ncurses.h.
 #undef KEY_EVENT
-#include <ncurses.h> // needed for some definitions, see terminfo(3ncurses)
 #include <term.h>
 #include <time.h>
 #include <term.h>

src/lib/termdesc.c

@@ -1,5 +1,6 @@
 #include <fcntl.h>
 #include <unistd.h>
+#include <curses.h>
 #ifdef __linux__
 #include <sys/utsname.h>
 #endif