Update SDL2 to 2.0.4

code/SDL2/include/SDL_rwops.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
@@ -93,7 +93,7 @@ typedef struct SDL_RWops
     Uint32 type;
     union
     {
-#if defined(ANDROID)
+#if defined(__ANDROID__)
         struct
         {
             void *fileNameRef;
@@ -220,7 +220,6 @@ extern DECLSPEC size_t SDLCALL SDL_WriteLE64(SDL_RWops * dst, Uint64 value);
 extern DECLSPEC size_t SDLCALL SDL_WriteBE64(SDL_RWops * dst, Uint64 value);
 /* @} *//* Write endian functions */
 
-
 /* Ends C function definitions when using C++ */
 #ifdef __cplusplus
 }