From 81c96cec89dd280cab71170f50b9c088476d263c Mon Sep 17 00:00:00 2001
From: Hiltjo Posthuma <hiltjo@codemadness.org>
Date: Sat, 3 Jul 2021 11:44:18 +0200
Subject: [PATCH] check key for NULL dereference, just in case

This matches the check pattern in other parts of the code.
---
 svkbd.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/svkbd.c b/svkbd.c
index d80103a..68a2062 100644
--- a/svkbd.c
+++ b/svkbd.c
@@ -643,7 +643,8 @@ unpress(Key *k, KeySym buttonmod)
 		}
 	}
 
-	if (enableoverlays && currentoverlay != -1 && !IsModifierKey(k->keysym)) {
+	if (enableoverlays && currentoverlay != -1 &&
+	    (k == NULL || !IsModifierKey(k->keysym))) {
 		if (releaseprotect) {
 			releaseprotect = 0;
 		} else {