the next step in our error code handling change

- added WERROR for win32 error codes
- added a configure test for immediate structures

still lots to do, so its not enabled by default, but the main
structure is there
(This used to be commit 24f9ab683d)

source3/libsmb/smberr.c

@@ -182,3 +182,14 @@ char *smb_errstr(char *inbuf)
   slprintf(ret, sizeof(ret) - 1, "Error: Unknown error (%d,%d)",class,num);
   return(ret);
 }
+
+
+/*****************************************************************************
+ returns an WERROR error message.
+ *****************************************************************************/
+char *werror_str(WERROR status)
+{
+	static fstring msg;
+	slprintf(msg, sizeof(msg), "WIN32 code 0x%08x", W_ERROR_V(status));
+	return msg;
+}