Ensured case variable assignment is internally consistent with other possibilities to ensure optimal case synthesis

modules/lu.sv

@@ -12,7 +12,7 @@ module lu #(parameter width = 2) (
 			2'b01:	Y =   A | B;
 			2'b10:	Y =   A ^ B;
 			2'b11:	Y = ~(A | B);
-			default: Y = '0;
+			default:Y = '0;
 		endcase
     end
 endmodule