SDL2: updated to 2.0.7
2.0.7:
General:
* Added audio stream conversion functions:
SDL_NewAudioStream
SDL_AudioStreamPut
SDL_AudioStreamGet
SDL_AudioStreamAvailable
SDL_AudioStreamFlush
SDL_AudioStreamClear
SDL_FreeAudioStream
* Added functions to query and set the SDL memory allocation functions:
SDL_GetMemoryFunctions()
SDL_SetMemoryFunctions()
SDL_GetNumAllocations()
* Added locking functions for multi-threaded access to the joystick and game controller APIs:
SDL_LockJoysticks()
SDL_UnlockJoysticks()
* The following functions are now thread-safe:
SDL_SetEventFilter()
SDL_GetEventFilter()
SDL_AddEventWatch()
SDL_DelEventWatch()
UnifiedSplitRaw