Updated VC++ project files for 4.0.4

Only write short usage if one starts mysqldump without any options
Added query cache on windows
Added error message if one can't read privilege tables

sql/sql_class.cc

@@ -109,6 +109,7 @@ THD::THD():user_time(0),fatal_error(0),last_insert_id_used(0),
   dbug_sentry=THD_SENTRY_MAGIC;
 #endif  
   net.vio=0;
+  net.last_error[0]=0;				// If error on boot
   ull=0;
   system_thread=cleanup_done=0;
   transaction.changed_tables = 0;