gprs_ns2: make nsvc argument const
The nsvc isn't change. It can be const
Change-Id: Ie5052f02781d7fdc639456c6f02515a927cee1f3
diff --git a/src/gb/gprs_ns2_fr.c b/src/gb/gprs_ns2_fr.c
index b62b5af..925d5ed 100644
--- a/src/gb/gprs_ns2_fr.c
+++ b/src/gb/gprs_ns2_fr.c
@@ -714,7 +714,7 @@
* \param[in] nsvc
* \return the dlci or 0 on error. 0 is not a valid dlci.
*/
-uint16_t gprs_ns2_fr_nsvc_dlci(struct gprs_ns2_vc *nsvc)
+uint16_t gprs_ns2_fr_nsvc_dlci(const struct gprs_ns2_vc *nsvc)
{
struct priv_vc *vcpriv;