fix HAVE_SDL_AUDIO flag of CMakeLists.txt

CMakeLists.txt

@@ -1607,16 +1607,17 @@ elseif(WINDOWS)
 
   if(SDL_AUDIO)
     if(NOT WINDOWS_STORE)
-    set(SDL_AUDIO_DRIVER_WINMM 1)
-    file(GLOB WINMM_AUDIO_SOURCES ${SDL2_SOURCE_DIR}/src/audio/winmm/*.c)
-    set(SOURCE_FILES ${SOURCE_FILES} ${WINMM_AUDIO_SOURCES})
+      set(SDL_AUDIO_DRIVER_WINMM 1)
+      file(GLOB WINMM_AUDIO_SOURCES ${SDL2_SOURCE_DIR}/src/audio/winmm/*.c)
+      set(SOURCE_FILES ${SOURCE_FILES} ${WINMM_AUDIO_SOURCES})
+      set(HAVE_SDL_AUDIO TRUE)
     endif()
-    set(HAVE_SDL_AUDIO TRUE)
 
     if(HAVE_DSOUND_H AND NOT WINDOWS_STORE)
       set(SDL_AUDIO_DRIVER_DSOUND 1)
       file(GLOB DSOUND_AUDIO_SOURCES ${SDL2_SOURCE_DIR}/src/audio/directsound/*.c)
       set(SOURCE_FILES ${SOURCE_FILES} ${DSOUND_AUDIO_SOURCES})
+      set(HAVE_SDL_AUDIO TRUE)
     endif()
 
     if(SDL_WASAPI AND HAVE_AUDIOCLIENT_H AND HAVE_MMDEVICEAPI_H)
@@ -1627,6 +1628,7 @@ elseif(WINDOWS)
         list(APPEND WASAPI_AUDIO_SOURCES ${SDL2_SOURCE_DIR}/src/audio/wasapi/SDL_wasapi_winrt.cpp)
       endif()
       set(SOURCE_FILES ${SOURCE_FILES} ${WASAPI_AUDIO_SOURCES})
+      set(HAVE_SDL_AUDIO TRUE)
     endif()
   endif()
 
@@ -1643,8 +1645,8 @@ elseif(WINDOWS)
         ${SDL2_SOURCE_DIR}/src/render/direct3d11/*.cpp
         )
     else()
-    set(SDL_VIDEO_DRIVER_WINDOWS 1)
-    file(GLOB WIN_VIDEO_SOURCES ${SDL2_SOURCE_DIR}/src/video/windows/*.c)
+      set(SDL_VIDEO_DRIVER_WINDOWS 1)
+      file(GLOB WIN_VIDEO_SOURCES ${SDL2_SOURCE_DIR}/src/video/windows/*.c)
     endif()
     set(SOURCE_FILES ${SOURCE_FILES} ${WIN_VIDEO_SOURCES})