ocfs2: one function call less in user_cluster_connect() after error detection

ocfs2: one function call less in user_cluster_connect() after error detection

kfree() was called by user_cluster_connect() even if a previous call of
the kzalloc() function failed.

Return from this implementation directly after failure detection.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>