mgcp_client: mgcp_msg_gen: add more error logs
While adding CSD, this failed for me in add_lco without a descriptive
log message, so add more error messages.
Related: OS#4393
Change-Id: I4873a2db95525aab3e13046b645dd8f90e951466
diff --git a/tests/mgcp_client/mgcp_client_test.err b/tests/mgcp_client/mgcp_client_test.err
index 4a73f7f..d666cba 100644
--- a/tests/mgcp_client/mgcp_client_test.err
+++ b/tests/mgcp_client/mgcp_client_test.err
@@ -1,5 +1,6 @@
DLMGCP MGW(mgw) MGCP client: using endpoint domain '@mgw'
DLMGCP MGW(mgw) Message buffer to small, can not generate MGCP message (SDP)
+DLMGCP MGW(mgw) Failed to add SDP, can not generate MGCP message
test_mgcp_client_cancel():
DLMGCP MGW(mgw) MGCP client: using endpoint domain '@mgw'