[svn r76] Fixed: TypeInfo for structs.

Fixed: PostExp was unable to allocate storage for parameters.
Fixed: Many types of functions and delegates were broken.
Misc cleanups.

test/bug40.d

@@ -0,0 +1,12 @@
+module bug40;
+
+char[] func(void* p)
+{
+    return null;
+}
+
+void main()
+{
+    char[] function(void*) fp = &func;
+    assert(fp(null) is null);
+}