From ab91bfd39f6b8236864f0f1fa057c3abbc5801bc Mon Sep 17 00:00:00 2001
From: Cristy <urban-warrior@imagemagick.org>
Date: Sun, 16 Jun 2019 10:41:42 -0400
Subject: [PATCH] ...

---
 MagickCore/xwindow.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/MagickCore/xwindow.c b/MagickCore/xwindow.c
index 3cf4b3b6f..12f92d8a1 100644
--- a/MagickCore/xwindow.c
+++ b/MagickCore/xwindow.c
@@ -5528,6 +5528,7 @@ MagickPrivate MagickBooleanType XMakeImage(Display *display,
       segment_info[1].shmaddr=(char *) NULL;
       ximage=XShmCreateImage(display,window->visual,(unsigned int) depth,format,
         (char *) NULL,&segment_info[1],width,height);
+      length=0;
       if (ximage == (XImage *) NULL)
         window->shared_memory=MagickFalse;
       else
-- 
2.40.0