mgw: Fix return value documentation for API mgcp_verify_call_id
Change-Id: Ib5d32baf3a10dad73de29b4388eab14b93ab6f09
diff --git a/src/libosmo-mgcp/mgcp_msg.c b/src/libosmo-mgcp/mgcp_msg.c
index 2023a68..4242d3d 100644
--- a/src/libosmo-mgcp/mgcp_msg.c
+++ b/src/libosmo-mgcp/mgcp_msg.c
@@ -245,7 +245,7 @@
/*! Check if the specified callid seems plausible.
* \param[in] endp pointer to endpoint
* \param{in] callid to verify
- * \returns 1 when callid seems plausible, 0 on error */
+ * \returns 0 when callid seems plausible, -1 on error */
int mgcp_verify_call_id(struct mgcp_endpoint *endp, const char *callid)
{
/*! This function compares the supplied callid with the called that is