Fixed this memory leak:
==30721== 174984 bytes in 14582 blocks are definitely lost in loss record 20 of 25
==30721== at 0x40043BDB: malloc (vg_clientfuncs.c:100)
==30721== by 0x804E02A: addsettings (rules.c:235)
==30721== by 0x804A2AF: collect_arguments (compile.c:652)
==30721== by 0x804A759: evaluate_rule (compile.c:864)
==30721== by 0x804A072: compile_rule (compile.c:563)
==30721== by 0x804DDBC: parse_evaluate (parse.c:138)
==30721== by 0x80497FD: compile_append (compile.c:124)
[SVN r14298]