Update pclzip.lib.php

Fix deprecated construct definition

lib_ext/pclzip/pclzip.lib.php

@@ -194,7 +194,7 @@ class PclZip
   //   Note that no real action is taken, if the archive does not exist it is not
   //   created. Use create() for that.
   // --------------------------------------------------------------------------------
-  function PclZip($p_zipname)
+  function __construct($p_zipname)
   {
     //--(MAGIC-PclTrace)--//PclTraceFctStart(__FILE__, __LINE__, 'PclZip::PclZip', "zipname=$p_zipname");