* src/stream_output/announce.c: msvc compilation fix.

src/stream_output/announce.c

@@ -28,7 +28,9 @@
 #include <stdio.h>                                              /* sprintf() */
 #include <string.h>                                            /* strerror() */
 
-#include <unistd.h>
+#ifdef HAVE_UNISTD_H
+#   include <unistd.h>
+#endif
 
 #include <vlc/vlc.h>