osmo-mgw: err-log: include expected domain name

Add the expected domain name, and move the error log to where the expected
domain name is compared.

Change-Id: I59f40dc9263f686852f103ca904fc0a6702d7c8e
diff --git a/src/libosmo-mgcp/mgcp_msg.c b/src/libosmo-mgcp/mgcp_msg.c
index 648d86b..f98b9ee 100644
--- a/src/libosmo-mgcp/mgcp_msg.c
+++ b/src/libosmo-mgcp/mgcp_msg.c
@@ -223,8 +223,10 @@
 	if (!strcmp(cfg->domain, "*"))
 		return 0;
 
-	if (strcmp(domain_to_check+1, cfg->domain) != 0)
+	if (strcmp(domain_to_check+1, cfg->domain) != 0) {
+		LOGP(DLMGCP, LOGL_ERROR, "Wrong domain name '%s', expecting '%s'\n", mgcp, cfg->domain);
 		return -EINVAL;
+	}
 
 	return 0;
 }
@@ -244,7 +246,6 @@
 
 	/* Check if the domainname in the request is correct */
 	if (check_domain_name(cfg, mgcp)) {
-		LOGP(DLMGCP, LOGL_ERROR, "Wrong domain name '%s'\n", mgcp);
 		*cause = -500;
 		return NULL;
 	}