build fixes for most WinRT-related files

Still TODO: getting the D3D11 renderer back up and running in VC 2012.

src/core/winrt/SDL_winrtapp_direct3d.cpp

@@ -26,6 +26,7 @@ using namespace Windows::Phone::UI::Input;
 
 /* SDL includes */
 extern "C" {
+#include "../../SDL_internal.h"
 #include "SDL_assert.h"
 #include "SDL_events.h"
 #include "SDL_hints.h"

src/core/winrt/SDL_winrtapp_xaml.cpp

@@ -29,6 +29,7 @@
 
 
 /* SDL includes */
+#include "../../SDL_internal.h"
 #include "SDL.h"
 #include "../../video/winrt/SDL_winrtevents_c.h"
 #include "../../video/winrt/SDL_winrtvideo_cpp.h"

src/filesystem/winrt/SDL_sysfilesystem.cpp

@@ -2,7 +2,7 @@
    TODO, WinRT: remove the need to compile this with C++/CX (/ZW) extensions, and if possible, without C++ at all
 */
 
-#include "SDL_config.h"
+#include "../../SDL_internal.h"
 
 #ifdef __WINRT__
 

src/thread/stdcpp/SDL_syscond.cpp

@@ -18,7 +18,7 @@
      misrepresented as being the original software.
   3. This notice may not be removed or altered from any source distribution.
 */
-#include "SDL_config.h"
+#include "../../SDL_internal.h"
 
 extern "C" {
 #include "SDL_thread.h"

src/thread/stdcpp/SDL_sysmutex.cpp

@@ -18,7 +18,7 @@
      misrepresented as being the original software.
   3. This notice may not be removed or altered from any source distribution.
 */
-#include "SDL_config.h"
+#include "../../SDL_internal.h"
 
 extern "C" {
 #include "SDL_thread.h"

src/thread/stdcpp/SDL_systhread.cpp

@@ -18,7 +18,7 @@
      misrepresented as being the original software.
   3. This notice may not be removed or altered from any source distribution.
 */
-#include "SDL_config.h"
+#include "../../SDL_internal.h"
 
 /* Thread management routines for SDL */
 

src/video/winrt/SDL_winrtkeyboard.cpp

@@ -18,7 +18,7 @@
      misrepresented as being the original software.
   3. This notice may not be removed or altered from any source distribution.
 */
-#include "SDL_config.h"
+#include "../../SDL_internal.h"
 
 #if SDL_VIDEO_DRIVER_WINRT
 

src/video/winrt/SDL_winrtmouse.cpp

@@ -19,7 +19,7 @@
   3. This notice may not be removed or altered from any source distribution.
 */
 
-#include "SDL_config.h"
+#include "../../SDL_internal.h"
 
 #if SDL_VIDEO_DRIVER_WINRT
 

src/video/winrt/SDL_winrtvideo.cpp

@@ -18,7 +18,7 @@
      misrepresented as being the original software.
   3. This notice may not be removed or altered from any source distribution.
 */
-#include "SDL_config.h"
+#include "../../SDL_internal.h"
 
 #if SDL_VIDEO_DRIVER_WINRT