Make sure libao-1.2.2 is loaded in windows.

libao-async-ffi.rkt

@@ -4,7 +4,7 @@
 (require ffi/unsafe
          ffi/unsafe/define
          "private/utils.rkt"
-         "libao-ffi.rkt"
+         ;"libao-ffi.rkt"
          )
 
 (provide ao_create_async
@@ -48,6 +48,9 @@
    ))
 
 
+(when (eq? (system-type 'os) 'windows)
+  (void (get-lib '("libao-1.2.2") '(#f))))
+
 (define lib (get-lib '("ao-play-async" "libao-play-async") '(#f)))
 ;(define lib (ffi-lib "/home/hans/src/racket/racket-sound-lib/lib/linux-x86_64/libao-play-async.so"))
 (define-ffi-definer define-libao-async lib