Fixed bug #2032: add SDL_GetTouchName to expose the driver name of the device (Thanks @mgerhardy!)

include/SDL_touch.h

@@ -95,6 +95,11 @@ extern DECLSPEC int SDLCALL SDL_GetNumTouchDevices(void);
  */
 extern DECLSPEC SDL_TouchID SDLCALL SDL_GetTouchDevice(int index);
 
+/**
+ *  \brief Get the touch device name as reported from the driver or NULL if the index is invalid.
+ */
+extern DECLSPEC const char* SDLCALL SDL_GetTouchName(int index);
+
 /**
  * Get the type of the given touch device.
  *