feedback: make an error check work also when curses hasn't started yet

Add a temporary boolean for this, because isendwin() returns TRUE
only when curses mode has actually been started with initscr() and
then exited with endwin().

src/global.c

@@ -47,6 +47,8 @@ bool as_an_at = TRUE;
 bool control_C_was_pressed = FALSE;
 		/* Whether Ctrl+C was pressed (when a keyboard interrupt is enabled). */
 
+bool started_curses = FALSE;
+
 bool suppress_cursorpos = FALSE;
 		/* Should we skip constant position display for current keystroke? */
 

src/nano.c

@@ -2502,6 +2502,8 @@ int main(int argc, char **argv)
 	if (initscr() == NULL)
 		exit(1);
 
+	started_curses = TRUE;
+
 #ifdef ENABLE_COLOR
 	set_colorpairs();
 #else

src/proto.h

@@ -42,6 +42,8 @@ extern bool control_C_was_pressed;
 
 extern bool suppress_cursorpos;
 
+extern bool started_curses;
+
 extern message_type lastmessage;
 
 extern linestruct *pletion_line;

src/winio.c

@@ -2213,8 +2213,10 @@ void statusline(message_type importance, const char *msg, ...)
 
 #ifndef NANO_TINY
 	/* Curses mode shouldn't be off when trying to write to the status bar. */
-	if (isendwin()) {
+	if (!started_curses || isendwin()) {
 		fprintf(stderr, "Out of curses -- please report a bug\n");
+		lastmessage = HUSH;
+		napms(1400);
 		return;
 	}
 #endif