Correct the lock.l_type logic for platforms where O_RDONLY is 0.

git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@1896 d4fa192b-c00b-0410-8231-f00ffab90ce4

lib/libvarnish/flopen.c

@@ -60,7 +60,7 @@ flopen(const char *path, int flags, ...)
 		va_end(ap);
 	}
 
-	lock.l_type = (flags & O_RDONLY) ? F_RDLCK : F_WRLCK;
+	lock.l_type = ((flags & O_ACCMODE) == O_RDONLY) ? F_RDLCK : F_WRLCK;
 	lock.l_start = 0;
 	lock.l_whence = SEEK_SET;
 	lock.l_len = 0;