fix to use AudioIOSun on Solaris and NetBSD

`USE_SOLARIS` is not defined (related to TDE/tde#74).

On NetBSD, native audio system audioio(4) i.e. sunaudio is preferred.

Signed-off-by: OBATA Akio <obache@wizdas.com>
(cherry picked from commit 0c717ee493)

flow/audioiosun.cpp

@@ -45,9 +45,9 @@
 #endif
 
 /*
- * Only compile this AudioIO class if we're on Solaris
+ * Only compile this AudioIO class if we're on Solaris or NetBSD
  */
-#ifdef USE_SOLARIS
+#if defined(__sun) || defined(__NetBSD__)
 
 #include <sys/types.h>
 #include <sys/ioctl.h>
@@ -55,8 +55,10 @@
 #include <sys/stat.h>
 
 #include <sys/audioio.h>
+#ifdef __sun
 #include <stropts.h>
 #include <sys/conf.h>
+#endif
 
 #include <assert.h>
 #include <errno.h>
@@ -73,6 +75,10 @@
 #include "iomanager.h"
 #include "dispatcher.h"
 
+#ifdef __NetBSD__
+typedef u_int uint_t;
+#endif
+
 // This looks like the maximum buffer size according to the sys/audio*.h 
 // files on Solaris7
 #define SUN_MAX_BUFFER_SIZE		(65536)
@@ -439,4 +445,4 @@ int AudioIOSun::write(void *buffer, int size)
     return size;
 }
 
-#endif /* USE_SOLARIS */
+#endif /* defined(__sun) || defined(__NetBSD__) */