codegen: Generated SimpleType structs don't have a type id
codegen: Generated SimpleType structs don't have a type id

Set "CCode.has_type_id" in CCodeStructModule.generate_struct_declaration()
like in GTypeModule.visit_struct() for SimpleType structs which might be
executed too late.

In addition to 2e798fc3f8e9af25a4c231c2561894d9f0a0be50

frida/vala,GNOME/vala,GNOME/vala,frida/vala,frida/vala,frida/vala,GNOME/vala,frida/vala,GNOME/vala