SDL: wayland: Don't modify the mouse capture flag in relative mode

SDL Commits
1 
From 33a430056f15fa5e75ee11f3d7917b4fd2f81c1a Mon Sep 17 00:00:00 2001
From: Frank Praznik <[EMAIL REDACTED]>
Date: Mon, 31 Oct 2022 12:23:51 -0400
Subject: [PATCH] wayland: Don't modify the mouse capture flag in relative mode

If relative mouse mode is explicitly enabled, don't modify the capture flag on button events or the window might report having lost mouse focus if a button is pressed while moving the cursor.
---
 src/video/wayland/SDL_waylandevents.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/src/video/wayland/SDL_waylandevents.c b/src/video/wayland/SDL_waylandevents.c
index 01e5ad404887..5d8cdb1fd220 100644
--- a/src/video/wayland/SDL_waylandevents.c
+++ b/src/video/wayland/SDL_waylandevents.c
@@ -590,6 +590,7 @@ pointer_handle_button_common(struct SDL_WaylandInput *input, uint32_t serial,
                              uint32_t time, uint32_t button, uint32_t state_w)
 {
     SDL_WindowData *window = input->pointer_focus;
+    SDL_VideoData *viddata = window->waylandData;
     enum wl_pointer_button_state state = state_w;
     uint32_t sdl_button;
 
@@ -628,10 +629,13 @@ pointer_handle_button_common(struct SDL_WaylandInput *input, uint32_t serial,
             input->buttons_pressed &= ~(SDL_BUTTON(sdl_button));
         }
 
-        if (input->buttons_pressed != 0) {
-            window->sdlwindow->flags |= SDL_WINDOW_MOUSE_CAPTURE;
-        } else {
-            window->sdlwindow->flags &= ~SDL_WINDOW_MOUSE_CAPTURE;
+        /* Don't modify the capture flag in relative mode. */
+        if (!viddata->relative_mouse_mode) {
+            if (input->buttons_pressed != 0) {
+                window->sdlwindow->flags |= SDL_WINDOW_MOUSE_CAPTURE;
+            } else {
+                window->sdlwindow->flags &= ~SDL_WINDOW_MOUSE_CAPTURE;
+            }
         }
 
         Wayland_data_device_set_serial(input->data_device, serial);