SPIT entry point parameters.
The host application passes a pointer to this structure for the module's information. The pointer should not be held, as it may be freed or reused by the host application after calling the entry point. The module should copy any information it may need (or hold a GObject reference) in its own memory space.
Note that the module must fill in the module_spit_interface field with the SPIT interface version it understands prior to returning control.