atl: AtlModuleGetClassObject should store an intermediate pointer in obj->pCF and then query this for the requested interface.

Return CLASS_E_CLASSNOTAVAILABLE instead of E_FAIL.

winebuild: Refer to strings used in generated stubs by symbol rather than by offset to avoid problems when the compiler aligns the strings by 2 or more bytes.

janitorial: Pass HEAP_ZERO_MEMORY as flag to HeapAlloc() instead of zeroing out the allocated memory in a later call.