is_single_item not set for single member profiles

[johnjamesjacoby]

When viewing a single member, buddypress()->is_single_item remains false.

This seems counter-intuitive to the purpose of this variable, which is to help discern the type of content being viewed.

Nothing is broken as a result, but perhaps this could be a useful crutch for bp_is_user() and bp_is_my_profile() instead of relying on bp_displayed_user_id() which works, but maybe isn't as semantically correct.

(Tangentially, this property will likely be less useful if we ever get to implementing rewrite rules.)