SDL: fixed build after commit 6e356e20ad

SDL Commits
1 
From 311671a0292d54a1886620a839c720b297de8885 Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Tue, 12 Oct 2021 23:50:02 +0300
Subject: [PATCH] fixed build after commit 6e356e20ad

---
 src/video/windows/SDL_windowsevents.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/video/windows/SDL_windowsevents.c b/src/video/windows/SDL_windowsevents.c
index 42127065dd..0a8fee2612 100644
--- a/src/video/windows/SDL_windowsevents.c
+++ b/src/video/windows/SDL_windowsevents.c
@@ -979,8 +979,7 @@ WIN_WindowProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
            being lost. This then causes a cascading failure where SDL_WINDOWEVENT_ENTER / SDL_WINDOWEVENT_LEAVE
            can stop firing permanently, due to the focus being in the wrong state and TrackMouseEvent never
            resubscribing. */
-        const SDL_bool isCapture = ((data->window->flags & SDL_WINDOW_MOUSE_CAPTURE) != 0);
-        if (!isCapture)
+        if (!(data->window->flags & SDL_WINDOW_MOUSE_CAPTURE))
             SDL_SetMouseFocus(NULL);
 
         returnCode = 0;