Update Mapping.xml - fix GamepadButtonsFlags
Update Mapping.xml - fix GamepadButtonsFlags

Change GamepadButtonFlags mapping from type short to int.  This fixes an issue with Y flag being incorrectly mapped to Y = short.MinValue. It should be mapped to Y = 32768. 

Here's the relevant DirectX doc section ..

typedef struct _XINPUT_GAMEPAD {  
WORD  wButtons; 
...}

and this ...
XINPUT_GAMEPAD_X 0x4000
XINPUT_GAMEPAD_Y 0x8000
sharpdx/SharpDX,sharpdx/SharpDX,sharpdx/SharpDX