Win32: Fix glfwWaitEventsTimeout ignoring messages

The bitmask passed to MsgWaitForMultipleObjects was missing
QS_SENDMESSAGE, causing glfwWaitEventsTimeout not to return when the
thread received messages sent from other threads.

Fixes #2408

CONTRIBUTORS.md

@@ -142,6 +142,7 @@ video tutorials.
  - Marcel Metz
  - Liam Middlebrook
  - Ave Milia
+ - Icyllis Milica
  - Jonathan Miller
  - Kenneth Miller
  - Bruce Mitchener

README.md

@@ -230,6 +230,7 @@ information on what to include when reporting a bug.
  - [Win32] Bugfix: Instance-local operations used executable instance (#469,#1296,#1395)
  - [Win32] Bugfix: The OSMesa library was not unloaded on termination
  - [Win32] Bugfix: Right shift emitted `GLFW_KEY_UNKNOWN` when using a CJK IME (#2050)
+ - [Win32] Bugfix: `glfwWaitEventsTimeout` did not return for some sent messages (#2408)
  - [Cocoa] Added support for `VK_EXT_metal_surface` (#1619)
  - [Cocoa] Added locating the Vulkan loader at runtime in an application bundle
  - [Cocoa] Moved main menu creation to GLFW initialization time (#1649)

src/win32_window.c

@@ -2121,7 +2121,7 @@ void _glfwWaitEventsWin32(void)
 
 void _glfwWaitEventsTimeoutWin32(double timeout)
 {
-    MsgWaitForMultipleObjects(0, NULL, FALSE, (DWORD) (timeout * 1e3), QS_ALLEVENTS);
+    MsgWaitForMultipleObjects(0, NULL, FALSE, (DWORD) (timeout * 1e3), QS_ALLINPUT);
 
     _glfwPollEventsWin32();
 }