From: Toni Wilen <twilen@winuae.net>
Date: Sat, 8 Oct 2016 14:04:28 +0000 (+0300)
Subject: Can happen in bad programmed mode.
X-Git-Tag: 3400~58
X-Git-Url: https://git.unchartedbackwaters.co.uk/w/?a=commitdiff_plain;h=6c8d48e4e1f70427cf4f91fa8f0d70b9bc1f72b6;p=francis%2Fwinuae.git

Can happen in bad programmed mode.
---

diff --git a/drawing.cpp b/drawing.cpp
index 8336db01..092d2a4d 100644
--- a/drawing.cpp
+++ b/drawing.cpp
@@ -1103,6 +1103,8 @@ STATIC_INLINE void fill_line_32 (uae_u8 *buf, int start, int stop, bool blank)
 
 static void pfield_do_fill_line (int start, int stop, bool blank)
 {
+	if (stop <= start)
+		return;
 	switch (gfxvidinfo.drawbuffer.pixbytes) {
 	case 2: fill_line_16 (xlinebuffer, start, stop, blank); break;
 	case 4: fill_line_32 (xlinebuffer, start, stop, blank); break;