Update SDL2 to 2.0.4

code/SDL2/include/SDL_config_windows.h

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -76,6 +76,12 @@ typedef unsigned int uintptr_t;
 # define SIZEOF_VOIDP 4
 #endif
 
+#define HAVE_DDRAW_H 1
+#define HAVE_DINPUT_H 1
+#define HAVE_DSOUND_H 1
+#define HAVE_DXGI_H 1
+#define HAVE_XINPUT_H 1
+
 /* This is disabled by default to avoid C runtime dependencies and manifest requirements */
 #ifdef HAVE_LIBC
 /* Useful headers */
@@ -130,6 +136,9 @@ typedef unsigned int uintptr_t;
 #define HAVE_SIN 1
 #define HAVE_SINF 1
 #define HAVE_SQRT 1
+#define HAVE_SQRTF 1
+#define HAVE_TAN 1
+#define HAVE_TANF 1
 #if _MSC_VER >= 1800
 #define HAVE_STRTOLL 1
 #define HAVE_VSSCANF 1
@@ -153,7 +162,9 @@ typedef unsigned int uintptr_t;
 
 /* Enable various input drivers */
 #define SDL_JOYSTICK_DINPUT 1
+#define SDL_JOYSTICK_XINPUT 1
 #define SDL_HAPTIC_DINPUT   1
+#define SDL_HAPTIC_XINPUT   1
 
 /* Enable various shared object loading systems */
 #define SDL_LOADSO_WINDOWS  1