This hopefully makes the vertex attribute detection simpler, more solid, 
readable and flexible.

Varying arrays that aren't unmarshalled shouldn't be freed, but 
conformant arrays that aren't unmarshalled should.

Also print an error message if there was an overflow.

Fix Windows File Protection handling to use the correct system directory.

Make the stubs return success.

This allows keeping the default SIGTERM behavior of killing the whole
process.

ole32: Fix RPC_GetLocalClassObject to wait for 30 seconds, even if messages arrive while we are waiting.

safe_copy_from_buffer has the side-effect of incrementing the buffer and 
this still needs to be done when we point the memory into the buffer.

(Thanks to Maarten Lankhorst for finding the mistake and suggesting a fix.)