From 9037aadd042fc6d46becff7ba18710c538def147 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20Ekl=C3=B6f?= <daniel@ekloef.se>
Date: Wed, 9 Jan 2019 18:40:14 +0100
Subject: [PATCH] module/xwindow: some windows have a zero-length PID property

---
 modules/xwindow.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/modules/xwindow.c b/modules/xwindow.c
index a052a85..f699192 100644
--- a/modules/xwindow.c
+++ b/modules/xwindow.c
@@ -93,6 +93,11 @@ update_application(struct module *mod)
         return;
     }
 
+    if (xcb_get_property_value_length(r) == 0) {
+        free(r);
+        return;
+    }
+
     uint32_t pid;
     assert(xcb_get_property_value_length(r) == sizeof(pid));