Fix compile errors when compiling against freerdp3

[ccc-aaa]

FreeRDP/FreeRDP#7738 use settings field under instance->context instead of instance.

FreeRDP/FreeRDP@5f81005ecbd87d043f2ce39ea11c98065b1a1923 removes reference to MaxTimeInCheckLoop for version 3 since FreeRDP has dropped this field after migrating away from blocking poll loop.