Upcoming/just/top/popular returns null if page is empty

[Ratan Dhawtal]

When Upcoming/just/top/popular doesn't contains any data(page is empty) it returns null.

Instead of returning null we should return a proper error code and skip the parsing part.

[Ratan Dhawtal]

Fix for returning null when page doens't exist (just/top/upcoming/popular).

This fix will return a proper error code for pages that doesn't exists. (pages with no records. Fixes #25)

→ <<cset 16f9e7dfe9c0>>