sgsn: Fix f_cellid_to_RAI

Change-Id: I4f6d609119b4a9e211fb1b285e4fc3e42d8ebdb6
diff --git a/sgsn/SGSN_Tests.ttcn b/sgsn/SGSN_Tests.ttcn
index 7d47a1f..4c0a8ab 100644
--- a/sgsn/SGSN_Tests.ttcn
+++ b/sgsn/SGSN_Tests.ttcn
@@ -236,8 +236,8 @@
                 mncDigit3 := mcc_mnc[3],
                 mncDigit1 := mcc_mnc[4],
                 mncDigit2 := mcc_mnc[5],
-                lac := int2oct(cell_id.ra_id.lai.lac, 16),
-                rac := int2oct(cell_id.ra_id.rac, 8)
+                lac := int2oct(cell_id.ra_id.lai.lac, 2),
+                rac := int2oct(cell_id.ra_id.rac, 1)
         }
         return ret;
 };