Change ControlState typedef to double, and change all related floats/doubles to use it.

Fixes an off by 1 issue related to double->float->double conversion, and eliminates numerous warnings.

Source/Core/InputCommon/ControllerInterface/DInput/DInputJoystick.cpp

@@ -266,7 +266,7 @@ std::string Joystick::Hat::GetName() const
 
 ControlState Joystick::Axis::GetState() const
 {
-	return std::max(0.0f, ControlState(m_axis - m_base) / m_range);
+	return std::max(0.0, ControlState(m_axis - m_base) / m_range);
 }
 
 ControlState Joystick::Button::GetState() const