[svn r115] Implemented the ClassInfo.defaultConstructor member.

test/classinfo4.d

@@ -0,0 +1,18 @@
+module classinfo4;
+
+class C
+{
+}
+
+class D
+{
+    this()
+    {
+    }
+}
+
+void main()
+{
+    assert(C.classinfo.defaultConstructor is null);
+    assert(D.classinfo.defaultConstructor !is null);
+}