Add missing include, by Sylvain Petreolle.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3766 c046a42c-6fe2-441c-8c8c-71466251a162

hw/adlib.c

@@ -24,6 +24,7 @@
 #include <assert.h>
 #include "hw.h"
 #include "audiodev.h"
+#include "audio/audio.h"
 
 #define ADLIB_KILL_TIMERS 1