Fix declarations for systems supporting sane locks.

src/xpdev/filewrap.c

@@ -150,7 +150,7 @@ int DLLCALL sopen(char *fn, int access, int share)
 #ifndef F_SANEWRLCKNO
 	int	flock_op=LOCK_NB;	/* non-blocking */
 #endif
-#ifndef BSD
+#if defined(F_SANEWRLCKNO) || !defined(BSD)
 	struct flock alock;
 #endif