Big endian bug fix in memops.c (http://bugs.debian.org/cgi-bin/bugreport.cgi?msg=5;filename=11_be24bit.patch;att=1;bug=486308)

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@3636 0c269be4-1314-0410-8aa9-9f06e86f4224