When arriving at Mahara for the first time via SSO, the newly created user
is added to an institution.  During that process an attempt is made to add
institution access to the user's profile view before it gets created.  This
patch adds a check (and when the profile view eventually gets created,
institution access is added for all the owner's institutions).

Change-Id: I6a6d4fc3dcb324905e67f4d52aac4160cf9ce089
Signed-off-by: Richard Mansfield <richard.mansfield@catalyst.net.nz>