few fixes for test failures on windows

(and collateral changes)

mysql-test/t/innodb_mysql_lock.test:
  change the variable from the test, not from the .opt file.
  one mysqld restart less.
mysql-test/t/lowercase_table4.test:
  fix dos line endings
sql/handler.cc:
  don't access the uninitialized variable

sql/handler.cc

@@ -2868,7 +2868,7 @@ int handler::update_auto_increment()
       DBUG_RETURN(HA_ERR_AUTOINC_ERANGE);
 
   DBUG_PRINT("info",("auto_increment: %llu  nb_reserved_values: %llu",
-                     nr, nb_reserved_values));
+                     nr, append ? nb_reserved_values : 0));
 
   /* Store field without warning (Warning will be printed by insert) */
   save_count_cuted_fields= thd->count_cuted_fields;