[sr-dev] unused vars in tm module

[Juha Heinanen]

CC (gcc) [M tm.so]		rpc_uac.o
rpc_uac.c: In function 't_uac_send':
rpc_uac.c:679:7: warning: unused variable 'err_buf' [-Wunused-variable]
  char err_buf[MAX_REASON_LEN];
       ^
rpc_uac.c:678:22: warning: unused variable 'err_ret' [-Wunused-variable]
  int ret, sip_error, err_ret, fromtag, cseq_is, cseq;
                      ^
rpc_uac.c:678:11: warning: unused variable 'sip_error' [-Wunused-variable]
  int ret, sip_error, err_ret, fromtag, cseq_is, cseq;
           ^