Forums: Redirect url errors and messaging issue when topic_title (or topic_text) is empty

[nuprn1]

View Group
View Group Forum tab
Click on 'New Topic'

Leave title blank, enter textarea foobar
Click 'Post Topic'

Error message is displayed - but no reason to what went wrong.

Suggestion: check for if ( empty( $topic_title )

empty( $topic_text ) ) and add a core_message for each one.

Also after submission of the new topic, the page is redirected to a funky url:
​http://localhost/buddypress/groups/foobargroup/forum/topic//

Expected: to redirect back to
​http://localhost/buddypress/groups/foobargroup/forum/

this happens on the group level and forums directory

When posting from the forums directory, the funky url is:
​http://localhost/buddypress/groups/foobargroup//forum/topic//

[boonebgorges]

This was fixed in [3347].