From 4264361469fc54b85cc46dee0aa8e01a3f3272ab Mon Sep 17 00:00:00 2001
From: Shaolin <admshao@gmail.com>
Date: Wed, 29 Aug 2018 00:51:45 -0300
Subject: [PATCH] UI: Fix a rare multiview crash when clicked

This was triggered by openning a fullscreen projector and trying to alt
tab. The projector was still on top but the first click on a KDE system
was returning a NULL activeWindow.
---
 UI/window-projector.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/UI/window-projector.cpp b/UI/window-projector.cpp
index 7c89ff979..ee9ab5044 100644
--- a/UI/window-projector.cpp
+++ b/UI/window-projector.cpp
@@ -695,14 +695,16 @@ void OBSProjector::OBSSourceRemoved(void *data, calldata_t *params)
 
 static int getSourceByPosition(int x, int y, float ratio)
 {
-	QWidget *rec  = QApplication::activeWindow();
+	int pos = -1;
+	QWidget *rec = QApplication::activeWindow();
+	if (!rec)
+		return pos;
 	int     cx    = rec->width();
 	int     cy    = rec->height();
 	int     minX  = 0;
 	int     minY  = 0;
 	int     maxX  = cx;
 	int     maxY  = cy;
-	int     pos   = -1;
 
 	switch (multiviewLayout) {
 	case MultiviewLayout::HORIZONTAL_TOP_24_SCENES: