Remove an unused variable and fix a memory leak in sctp_connectx().

Approved by:	re (gjb)
MFC after:	3 days
Make svnlite (actually libapr) work correctly on big-endian arches.
Otherwise, you would get errors similar to:

$ svn co svn://svn.freebsd.org/base/head test
A    test/lib
A    test/lib/libutil
svn: E200014: Checksum mismatch for
'/home/dim/test/lib/libutil/kinfo_getproc.3':
   expected:  0882097a545210d88edff8f63b328602
     actual:  b378eb08a0f4d4c97c513c4b17207f59

Approved by:	re (gjb, marius)