gprs_ns2: add correct filename/linenr to sns failed log message

Change-Id: I117eaf8340fca50cb14392a3f05ea8feac1af3ed
diff --git a/src/gb/gprs_ns2_sns.c b/src/gb/gprs_ns2_sns.c
index 281f908..7a3729b 100644
--- a/src/gb/gprs_ns2_sns.c
+++ b/src/gb/gprs_ns2_sns.c
@@ -199,7 +199,7 @@
 	struct ns2_sns_state *gss = fi->priv;
 
 	if (reason)
-		LOGPFSML(fi, LOGL_ERROR, "NSE %d: SNS failed: %s\n", gss->nse->nsei, reason);
+		LOGPFSMLSRC(fi, LOGL_ERROR, file, line, "NSE %d: SNS failed: %s\n", gss->nse->nsei, reason);
 
 	if (gss->role == GPRS_SNS_ROLE_SGSN) {
 		if (!gss->nse->persistent)