Fix failing mingw32 build when there is space char in project path. (#2736)

Source/ThirdParty/SDL/cmake/sdlchecks.cmake

@@ -1068,7 +1068,7 @@ macro(CheckHIDAPI)
       set(HAVE_SDL_JOYSTICK TRUE)
       file(GLOB HIDAPI_SOURCES ${SDL2_SOURCE_DIR}/src/joystick/hidapi/*.c)
       set(SOURCE_FILES ${SOURCE_FILES} ${HIDAPI_SOURCES})
-      set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${LIBUSB_CFLAGS} -I${SDL2_SOURCE_DIR}/src/hidapi/hidapi")
+      set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${LIBUSB_CFLAGS} -I\"${SDL2_SOURCE_DIR}/src/hidapi/hidapi\"")
       if(NOT HIDAPI_SKIP_LIBUSB)
         set(SOURCE_FILES ${SOURCE_FILES} ${SDL2_SOURCE_DIR}/src/hidapi/libusb/hid.c)
         list(APPEND EXTRA_LIBS ${LIBUSB_LIBS})