From 27848bd2530ec570980e470bd3e01ef9e14ed5b0 Mon Sep 17 00:00:00 2001
From: jackun <jack.un@gmail.com>
Date: Wed, 12 Feb 2020 19:58:01 +0200
Subject: [PATCH] Don't crash if there's nothing to draw

---
 src/overlay.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/overlay.cpp b/src/overlay.cpp
index 9e7775e7..e9263ce3 100644
--- a/src/overlay.cpp
+++ b/src/overlay.cpp
@@ -2242,8 +2242,10 @@ static VkResult overlay_QueuePresentKHR(
          * wait on them as well, we can just wait on the overlay submission
          * semaphore.
          */
-      present_info.pWaitSemaphores = &draw->semaphore;
-      present_info.waitSemaphoreCount = 1;
+      if (draw) {
+         present_info.pWaitSemaphores = &draw->semaphore;
+         present_info.waitSemaphoreCount = 1;
+      }
 
       uint64_t ts0 = os_time_get();
       VkResult chain_result = queue_data->device->vtable.QueuePresentKHR(queue, &present_info);