From: Philippe Mathieu-Daudé <f4bug@amsat.org>
Date: Fri, 14 Feb 2020 00:13:01 +0000 (+0100)
Subject: hw/display/artist: Avoid drawing line when nothing to display
X-Git-Tag: v5.0.0-rc0~84^2~5
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b0f6455feac97e41045ee394e11c24d92c370f6e;p=thirdparty%2Fqemu.git

hw/display/artist: Avoid drawing line when nothing to display

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20200214001303.12873-5-f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---

diff --git a/hw/display/artist.c b/hw/display/artist.c
index 97c811b35e3..54920791165 100644
--- a/hw/display/artist.c
+++ b/hw/display/artist.c
@@ -579,6 +579,9 @@ static void draw_line(ARTISTState *s, int x1, int y1, int x2, int y2,
     } else {
         dy = y1 - y2;
     }
+    if (!dx || !dy) {
+        return;
+    }
 
     c1 = false;
     if (dy > dx) {