From 88503fbe3360a6004b8a2be8ff32cf221c8ef783 Mon Sep 17 00:00:00 2001
From: William Joye <wjoye@cfa.harvard.edu>
Date: Thu, 10 Nov 2016 16:53:09 -0500
Subject: add preventive check to make sure widgetGC has been created

---
 tksao/frame/base.C | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tksao/frame/base.C b/tksao/frame/base.C
index 22a0d9d..d981b9c 100644
--- a/tksao/frame/base.C
+++ b/tksao/frame/base.C
@@ -1685,6 +1685,10 @@ void Base::updateMagnifier(const Vector& vv)
   if (!(magnifierXImage && magnifierPixmap))
     return;
 
+  // just in case
+  if (!widgetGC)
+    widgetGC = XCreateGC(display, Tk_WindowId(tkwin), 0, NULL);
+
   if (useMagnifier) {
     updateMagnifierMatrices();
 
-- 
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