FS-3910 It seems to have a problem keeping up with the realtime audio.  Try this patch that introduces some prebuffering

FS-3916 --resolve i don't think its necessary for info but you could try it with another FS process to confirm

Use FTDM_SIZE_FMT where needed, don't treat ftdm_event_t as an int
(even if the e_type enum is the first member), datalen vs. *datalen fix
and other warnings.

All reported by __check_printf() (GCC + __attribute__((format(printf,x,y))) ).
Signed-off-by: Stefan Knoblich <stkn@openisdn.net>

... that could cause segmentation faults.

Caught while working on __check_printf() support for ftdm_log().
Signed-off-by: Stefan Knoblich <stkn@openisdn.net>

For compilers that seem to do the wrong thing(tm).

Speculative fix for:

  segfault at 1 ip b72145d3 sp b58f8bfc error 4 in libc-2.11.3.so

  #0  0xb7a5d5d3 in vfprintf () from /lib/i686/cmov/libc.so.6
  #1  0xb7a7cec7 in vasprintf () from /lib/i686/cmov/libc.so.6
  #2  0xb7dd7c5b in switch_vasprintf (...)
  #3  0xb6296de2 in ftdm_logger (...)
  #4  0xb621625d in misdn_handle_mph_information_ind (...) at ftmod_misdn.c:658
Signed-off-by: Stefan Knoblich <stkn@openisdn.net>

Also adds a local ftdm_channel_get_type_str() helper.
Signed-off-by: Stefan Knoblich <stkn@openisdn.net>