ftmod_pritap: Abort before overflowing spanparameters array and initialize to all zero
ftmod_isdn:   Fix overflow check, skip over parameters without name or value, initialize spanparameters array to all zero.
ftmod_libpri: Skip over parameters without name or value, initialize spanparameters array to all zero and drop "i < 10" hardcoded check.

This should fix:
	2010-11-15 09:24:34.609515 [ERR] ftmod_libpri.c:1741 Unknown parameter '', aborting configuration
	2010-11-15 09:24:34.609515 [ERR] mod_freetdm.c:3080 Error configuring FreeTDM span BRI_1
Signed-off-by: Stefan Knoblich <s.knoblich@axsentis.de>
Reported-by: Ingmar Schraub <is@eseco.de>