PHP notices when using print_join_page_counter

The constructor in the views handler for page counter is not happy when called without arguments.

Warning: Missing argument 1 for print_join_page_counter::construct(), called in /Users/ckj/Sites/inf/d7/sites/all/modules/views/includes/handlers.inc on line 120 and defined i print_join_page_counter->construct() (linje 14 af /Users/ckj/Sites/inf/d7/sites/all/modules/print/print_join_page_counter.inc).
Warning: Missing argument 2 for print_join_page_counter::construct(), called in /Users/ckj/Sites/inf/d7/sites/all/modules/views/includes/handlers.inc on line 120 and defined i print_join_page_counter->construct() (linje 14 af /Users/ckj/Sites/inf/d7/sites/all/modules/print/print_join_page_counter.inc).
Warning: Missing argument 3 for print_join_page_counter::construct(), called in /Users/ckj/Sites/inf/d7/sites/all/modules/views/includes/handlers.inc on line 120 and defined i print_join_page_counter->construct() (linje 14 af /Users/ckj/Sites/inf/d7/sites/all/modules/print/print_join_page_counter.inc).
Warning: Missing argument 4 for print_join_page_counter::construct(), called in 

Views will sometimes call without arguments and that works well, so the constructor needs to have default arguments. Made a patch that does that.