Use LONG instead of DWORD (unsigned int) when interacting with DIJOFS constants.

(cherry picked from commit 4a6e53b3c96825d8dcac7e23f606efad8b2aa1dd)

platform/windows/joypad_windows.cpp

@@ -203,7 +203,7 @@ void JoypadWindows::setup_joypad_object(const DIDEVICEOBJECTINSTANCE *ob, int p_
 		HRESULT res;
 		DIPROPRANGE prop_range;
 		DIPROPDWORD dilong;
-		DWORD ofs;
+		LONG ofs;
 		if (ob->guidType == GUID_XAxis)
 			ofs = DIJOFS_X;
 		else if (ob->guidType == GUID_YAxis)
@@ -426,7 +426,7 @@ void JoypadWindows::process_joypads() {
 
 		// on mingw, these constants are not constants
 		int count = 8;
-		unsigned int axes[] = { DIJOFS_X, DIJOFS_Y, DIJOFS_Z, DIJOFS_RX, DIJOFS_RY, DIJOFS_RZ, DIJOFS_SLIDER(0), DIJOFS_SLIDER(1) };
+		LONG axes[] = { DIJOFS_X, DIJOFS_Y, DIJOFS_Z, DIJOFS_RX, DIJOFS_RY, DIJOFS_RZ, (LONG)DIJOFS_SLIDER(0), (LONG)DIJOFS_SLIDER(1) };
 		int values[] = { js.lX, js.lY, js.lZ, js.lRx, js.lRy, js.lRz, js.rglSlider[0], js.rglSlider[1] };
 
 		for (int j = 0; j < joy->joy_axis.size(); j++) {

platform/windows/joypad_windows.h

@@ -78,7 +78,7 @@ private:
 		DWORD last_pad;
 
 		LPDIRECTINPUTDEVICE8 di_joy;
-		List<DWORD> joy_axis;
+		List<LONG> joy_axis;
 		GUID guid;
 
 		dinput_gamepad() {