# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1541286249 -3600
# Node ID 08938ad9d6014ef41f04ab9a7c859bbd72a3a0fe
# Parent  87260bbe53995d6d33d72d0fa16a1b256381f689
Check the requested number of frames.

diff -r 87260bbe5399 -r 08938ad9d601 lib/display.c
--- a/lib/display.c	Sat Nov 03 22:10:25 2018 +0100
+++ b/lib/display.c	Sun Nov 04 00:04:09 2018 +0100
@@ -75,6 +75,9 @@
 
 void set_frames(display_config_t *cfg, int frames)
 {
+    if ((frames <= 0) || (frames > cfg->max_frames))
+        return;
+
     /* Recalculate the number of lines. */
 
     cfg->line_count = (cfg->total_lines - cfg->max_frames) / frames;