Add test for command tree traversal

Jan Breuer

2015-04-19 4758bdc8a35c3604f8b6dd72b3d49e7bc5ff9b1e

 libscpi/src/units.c

@@ -111,6 +111,7 @@
    {/* name */ "NAN",          /* type */ SCPI_NUM_NAN},
    {/* name */ "INFinity",     /* type */ SCPI_NUM_INF},
    {/* name */ "NINF",         /* type */ SCPI_NUM_NINF},
    {/* name */ "AUTO",         /* type */ SCPI_NUM_AUTO},
    SCPI_SPECIAL_NUMBERS_LIST_END,
};