advapi32 file lsa.c LsapIsLocalComputer() clobbers pointer and may leak

This routine has a bug which causes an exception.
This routine contains the lines.

    if (Result && (ServerName->Buffer[0] == '\\') && (ServerName->Buffer[1] == '\\')) 

        ServerName += 2;

    Result = Result && !lstrcmpW(ServerName->Buffer, buf); 

they are intended to skip over the two backslashes if they are present in the ServerName parameter passed in. Unfortunately that parameter is a PLSA_UNICODE_STRING rather than a plain string pointer so the code clobbers the pointer resulting in an exception and it fails to compare properly and causes the HeapFree() call that follows to be skipped.

I think it needs to be replaced with something like this to handle the pointer properly:

    	if (Result && (ServerName->Buffer[0] == '\\') && (ServerName->Buffer[1] == '\\')) {

		Result = Result && !lstrcmpW((LPCWSTR)&ServerName->Buffer[2], buf); 

	} else {

		Result = Result && !lstrcmpW(ServerName->Buffer, buf); 

	}

(Just a C hack, so please let me know if this needs adjustment).