client: make callid in MDCX mandatory

An MDCX without call-id does not make much sense. The call-id is
an integral element of the MDCX message to ensure that the correct
call is modified.

- update the presence check bitmasks to mark the call-id field
  mandatory for MDCX requests

Change-Id: Id2bcc3a68139e0d935790bcea2ef91eaf6291aa3
diff --git a/src/libosmo-mgcp-client/mgcp_client.c b/src/libosmo-mgcp-client/mgcp_client.c
index f094a09..135aed0 100644
--- a/src/libosmo-mgcp-client/mgcp_client.c
+++ b/src/libosmo-mgcp-client/mgcp_client.c
@@ -728,6 +728,7 @@
 			     MGCP_MSG_PRESENCE_CALL_ID | \
 			     MGCP_MSG_PRESENCE_CONN_MODE)
 #define MGCP_MDCX_MANDATORY (MGCP_MSG_PRESENCE_ENDPOINT | \
+			     MGCP_MSG_PRESENCE_CALL_ID |  \
 			     MGCP_MSG_PRESENCE_CONN_ID)
 #define MGCP_DLCX_MANDATORY (MGCP_MSG_PRESENCE_ENDPOINT)
 #define MGCP_AUEP_MANDATORY (MGCP_MSG_PRESENCE_ENDPOINT)