SDL: cmake: add X11 include dir to check dirs

SDL Commits
1 
From 622f64dff2bb8d65df9116d1c4a6bd64ce94104b Mon Sep 17 00:00:00 2001
From: Anonymous Maarten <[EMAIL REDACTED]>
Date: Thu, 24 Nov 2022 20:39:55 +0100
Subject: [PATCH] cmake: add X11 include dir to check dirs

---
 cmake/sdlchecks.cmake | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/cmake/sdlchecks.cmake b/cmake/sdlchecks.cmake
index 01fbbc396c85..ececfa942dc9 100644
--- a/cmake/sdlchecks.cmake
+++ b/cmake/sdlchecks.cmake
@@ -278,6 +278,7 @@ endmacro()
 # - SDL_X11_SHARED opt
 # - HAVE_SDL_LOADSO opt
 macro(CheckX11)
+  cmake_push_check_state(RESET)
   if(SDL_X11)
     foreach(_LIB X11 Xext Xcursor Xi Xfixes Xrandr Xrender Xss)
         FindLibraryAndSONAME("${_LIB}")
@@ -300,6 +301,7 @@ macro(CheckX11)
 
     if(X_INCLUDEDIR)
       list(APPEND EXTRA_CFLAGS "-I${X_INCLUDEDIR}")
+      list(APPEND CMAKE_REQUIRED_INCLUDES ${X_INCLUDEDIR})
     endif()
 
     find_file(HAVE_XCURSOR_H NAMES "X11/Xcursor/Xcursor.h" HINTS "${X_INCLUDEDIR}")
@@ -475,6 +477,7 @@ macro(CheckX11)
     # Prevent Mesa from including X11 headers
     list(APPEND EXTRA_CFLAGS "-DMESA_EGL_NO_X11_HEADERS -DEGL_NO_X11")
   endif()
+  cmake_pop_check_state()
 endmacro()
 
 macro(WaylandProtocolGen _SCANNER _CODE_MODE _XML _PROTL)