From 0eefa3ba428dd8988a27d791ccd59bad60d36529 Mon Sep 17 00:00:00 2001
From: Osspial <osspial@gmail.com>
Date: Thu, 30 May 2019 20:42:53 -0400
Subject: [PATCH] Fix compiler warning of potential undefined behavior (#892)

---
 src/platform_impl/windows/event_loop.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/platform_impl/windows/event_loop.rs b/src/platform_impl/windows/event_loop.rs
index 7fbde380..1d49060d 100644
--- a/src/platform_impl/windows/event_loop.rs
+++ b/src/platform_impl/windows/event_loop.rs
@@ -844,13 +844,14 @@ unsafe extern "system" fn public_window_callback<T>(
                 // spinning up a new event loop iteration. We do this because that's what the API
                 // says to do.
                 let control_flow = runner.control_flow;
+                let runner_state = runner.runner_state;
                 let mut request_redraw = || {
                     runner.call_event_handler(Event::WindowEvent {
                         window_id: RootWindowId(WindowId(window)),
                         event: RedrawRequested,
                     });
                 };
-                match runner.runner_state {
+                match runner_state {
                     RunnerState::Idle(..) |
                     RunnerState::DeferredNewEvents(..) => request_redraw(),
                     RunnerState::HandlingEvents => {