Add screen_exit() fn to restore screen defaults in debug mode

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

src/util.c

@@ -157,6 +157,10 @@ char *sanitize(char *arg, size_t len)
 	return NULL;
 }
 
+/*
+ * Called at boot, and shutdown, to (re)initialize the
+ * screen size for print() et al.
+ */
 void screen_init(void)
 {
 	if (!isatty(STDOUT_FILENO))
@@ -165,6 +169,16 @@ void screen_init(void)
 	initscr(&screen_rows, &screen_cols);
 }
 
+/*
+ * Called when debug mode is enabled to revert back
+ * to old-school safe defaults.
+ */
+void screen_exit(void)
+{
+	screen_rows = 24;
+	screen_cols = 80;
+}
+
 /**
  * Local Variables:
  *  indent-tabs-mode: t