Fix two memory leaks in parse.c.
Fix two memory leaks in parse.c.

Memory was leaked every time we received a SET RATE or SET PAUSE_CONTEXT
command.  We should be using TEST_CMD to test for these commands,
as is done for all of the other SET subcommands.

Signed-off-by: Hynek Hanke <0a4ca69cf26a50c3ccba72daf779af5d0d7fdca0@brailcom.org>

razr/speechd,razr/speechd,razr/speechd,razr/speechd