local sprintsigmask() now takes three args rather than two

--- signal.c
+++ signal.c
@@ -1440,7 +1440,7 @@ struct tcb *tcp;
 	  	tcp->u_rval = tcp->u_error = 0;
 		if(tcp->u_arg[0] == 0)
 		  	return 0;
-		tcp->auxstr = sprintsigmask("mask now ", tcp->u_arg[1]);
+		tcp->auxstr = sprintsigmask("mask now ", tcp->u_arg[1], 0);
 		return RVAL_NONE | RVAL_STR;
 	}
 	return 0;