Description:
------------
when using 2 databases at the same time with 2 links, database selection is lost.

Test script:
---------------
<?php

  $db1 = mysql_connect("localhost","user1","pass");
  mysql_select_db("database1",$db1);

  $db2 = mysql_connect("localhost","user2","pass");
  mysql_select_db("database2",$db2);


  if(!(mysql_query("select * from mytable",$db1)))
       print "error:".mysql_error();
     else
       print "ok";
?>

Expected result:
----------------
should print "ok" 
works fine with windows (builtin mysql) but not with debian lenny

Actual result:
--------------
error:Table 'database2.mytable' doesn't exist

the select is done on database2 although database1 was selected on the $db1 link.