Remove redundant message in AddUserToTokenDacl().

GetTokenUser() will have reported an adequate error message.  These
error conditions almost can't happen, so users are unlikely to observe
this change.

Reviewed by Tom Lane and Stephen Frost.

src/common/exec.c

@@ -674,10 +674,7 @@ AddUserToTokenDacl(HANDLE hToken)
 
 	/* Get the current user SID */
 	if (!GetTokenUser(hToken, &pTokenUser))
-	{
+		goto cleanup;			/* callee printed a message */
-		log_error("could not get token user: error code %lu", GetLastError());
-		goto cleanup;
-	}
 
 	/* Figure out the size of the new ACL */
 	dwNewAclSize = asi.AclBytesInUse + sizeof(ACCESS_ALLOWED_ACE) +