pcu_l1_if: cosmetic: correct error message in pcu_rx_info_ind()

Change-Id: I26ad0e990f6bf049a14f63b1255722d60c7ff868
diff --git a/src/pcu_l1_if.cpp b/src/pcu_l1_if.cpp
index fbd7e92..2374606 100644
--- a/src/pcu_l1_if.cpp
+++ b/src/pcu_l1_if.cpp
@@ -576,7 +576,7 @@
 		info_ind->mcc, info_ind->mnc, info_ind->mnc_3_digits, info_ind->lac, info_ind->rac,
 		info_ind->cell_id);
 	if (!pcu) {
-		LOGP(DL1IF, LOGL_NOTICE, "SGSN not available\n");
+		LOGP(DL1IF, LOGL_NOTICE, "SGSN is not available\n");
 		goto bssgp_failed;
 	}