ran_dec logging: log message sizes on errors

Change-Id: Id08e4ee5a4dbf552dbb107d8f0519110664f6acb
diff --git a/src/libmsc/ran_msg_a.c b/src/libmsc/ran_msg_a.c
index fd8afdc..43e27f6 100644
--- a/src/libmsc/ran_msg_a.c
+++ b/src/libmsc/ran_msg_a.c
@@ -761,13 +761,17 @@
 	}
 
 	if (msgb_l3len(bssmap) < h->length) {
-		LOG_RAN_A_DEC(ran_dec, LOGL_ERROR, "BSSMAP data truncated, discarding message\n");
+		LOG_RAN_A_DEC(ran_dec, LOGL_ERROR, "BSSMAP data truncated, discarding message:"
+			      " msgb_l3len(bssmap) == %u < bssmap_header->length == %u\n",
+			      msgb_l3len(bssmap), h->length);
 		return -1;
 	}
 
 	if (msgb_l3len(bssmap) > h->length) {
-		LOG_RAN_A_DEC(ran_dec, LOGL_NOTICE, "There are %u extra bytes after the BSSMAP data, truncating\n",
-			     msgb_l3len(bssmap) - h->length);
+		LOG_RAN_A_DEC(ran_dec, LOGL_NOTICE, "There are %u extra bytes after the BSSMAP data, truncating:"
+			      " msgb_l3len(bssmap) == %u > bssmap_header->length == %u\n",
+			      msgb_l3len(bssmap) - h->length,
+			      msgb_l3len(bssmap), h->length);
 		msgb_l3trim(bssmap, h->length);
 	}