MSVC and Windows SDK compatibility

src/win/win_joystick.cpp

@@ -18,6 +18,7 @@
  */
 #define DIRECTINPUT_VERSION 0x0800
 #include <dinput.h>
+#define _USE_MATH_DEFINES
 #include <math.h>
 #include <stdarg.h>
 #include <stdint.h>
@@ -29,6 +30,8 @@
 #include <86box/gameport.h>
 #include <86box/win.h>
 
+#define DIDEVTYPE_JOYSTICK	4
+
 
 plat_joystick_t plat_joystick_state[MAX_PLAT_JOYSTICKS];
 joystick_t joystick_state[MAX_JOYSTICKS];