From: Toni Wilen <twilen@winuae.net>
Date: Tue, 3 Jul 2018 19:01:33 +0000 (+0300)
Subject: vsync_hblank can be zero if DISPLAYCONFIG_VIDEO_SIGNAL_INFO is not available.
X-Git-Tag: 4010~30
X-Git-Url: https://git.unchartedbackwaters.co.uk/w/?a=commitdiff_plain;h=2ee5145559c8c14877934f98ac2abfb41a7c8e04;p=francis%2Fwinuae.git

vsync_hblank can be zero if DISPLAYCONFIG_VIDEO_SIGNAL_INFO is not available.
---

diff --git a/custom.cpp b/custom.cpp
index 7a06904f..71ddf146 100644
--- a/custom.cpp
+++ b/custom.cpp
@@ -8260,11 +8260,13 @@ static void scanlinesleep(int currline, int nextline)
 		return;
 	if (currline >= nextline)
 		return;
-	int diff = vsync_hblank / (nextline - currline);
-	int us = 1000000 / diff;
-	if (us < target_sleep_nanos(-1)) { // spin if less than minimum sleep time
-		target_spin(nextline - currline - 1);
-		return;
+	if (vsync_hblank) {
+		int diff = vsync_hblank / (nextline - currline);
+		int us = 1000000 / diff;
+		if (us < target_sleep_nanos(-1)) { // spin if less than minimum sleep time
+			target_spin(nextline - currline - 1);
+			return;
+		}
 	}
 	if (busywait) {
 		target_spin(1);