advapi32: Accept a NULL lpServiceStatus in ControlService

[Paul Chitescu]

Changelog:
	advapi32: Accept a NULL lpServiceStatus in ControlService

Although undocumented, Windows happily accepts a NULL pointer there.

Other note - QueryServiceStatus should not be called blindly on the caller 
provided LPSERVICE_STATUS:

"The service control manager fills in the structure only when ControlService 
returns one of the following error codes: NO_ERROR, 
ERROR_INVALID_SERVICE_CONTROL, ERROR_SERVICE_CANNOT_ACCEPT_CTRL, or 
ERROR_SERVICE_NOT_ACTIVE. Otherwise, the structure is not filled in."
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