Remember to initialize the version number, so we don't start out

processing all the old entries, unless -d was specified.

Fixes #1170

lib/libvarnishapi/vsl.c

@@ -145,6 +145,7 @@ vsl_open(struct VSM_data *vd)
 	}
 	if (vsl->log_ptr >= vsl->log_end)
 		vsl->log_ptr = vsl->log_start + 1;
+	vsl->last_seq = vsl->log_start[0];
 	return (0);
 }