x11: pass a long to XChangeProperty, not an int. The Xlib documentation demands that 32-bit values here be passed in a long, even when long itself isn't a 32-bit value. Otherwise libx11 might read memory incorrectly. Fixes Bugzilla #3692.
diff --git a/src/video/x11/SDL_x11window.c b/src/video/x11/SDL_x11window.c
index 6945369..1dd2a8e 100644
--- a/src/video/x11/SDL_x11window.c
+++ b/src/video/x11/SDL_x11window.c
@@ -375,7 +375,7 @@ X11_CreateWindow(_THIS, SDL_Window * window)
Atom _NET_WM_WINDOW_TYPE;
Atom wintype;
const char *wintype_name = NULL;
- int compositor = 1;
+ long compositor = 1;
Atom _NET_WM_PID;
Atom XdndAware, xdnd_version = 5;
long fevent = 0;