is_page function return true even if it gets 0 as an argument

[chandrapatel]

I think the is_page function should return false if 0 or false is passed.
I will try to explain why I faced problem because of this.

I used Product Vendor Plugin, it stores the vendor page id in "options". If it's not set, it returns 0.
Then the if condition satisfies because is_page( 0 ) returns true and then next line gets executed which redirects user to myaccount page (We didn't want this).

I corrected this problem in the plugin by different way. But I think that is_page should never return true if it gets 0 in parameter.

So if someone passes pageid = 0, then returning true implies page with id=0 is WordPress page. Let me know your thoughts.

[SergeyBiryukov]

Duplicate of #31723.

[chandrapatel]

I have attached patch file for ticket #32267