Add regression test for issue #1323.

ivtest/ivltests/br_gh1323_lib.v

@@ -0,0 +1,10 @@
+module br_gh1323_lib #(parameter `typ(X) = 0) ();
+
+initial begin
+  if (X == 1)
+    $display("PASSED");
+  else
+    $display("FAILED");
+end
+
+endmodule

ivtest/ivltests/br_gh1323_top.v

@@ -0,0 +1,7 @@
+`define typ(n) n
+
+module br_gh1323_top #(parameter `typ(X) = 1) ();
+
+br_gh1323_lib #(X) u0();
+
+endmodule

ivtest/regress-vvp.list

@@ -69,6 +69,7 @@ br_gh1256b			vvp_tests/br_gh1256b.json
 br_gh1258a			vvp_tests/br_gh1258a.json
 br_gh1258b			vvp_tests/br_gh1258b.json
 br_gh1286			vvp_tests/br_gh1286.json
+br_gh1323			vvp_tests/br_gh1323.json
 ca_time_real			vvp_tests/ca_time_real.json
 case1				vvp_tests/case1.json
 case2				vvp_tests/case2.json

ivtest/vvp_tests/br_gh1323.json

@@ -0,0 +1,5 @@
+{
+    "type"          : "normal",
+    "source"        : "br_gh1323_top.v",
+    "iverilog-args" : [ "-yivltests" ]
+}