ggsn_tests: fix typo

Change-Id: Iefd1bfead68878553cbfd0f34ea8aaa4bdd40a41
diff --git a/ggsn_tests/GGSN_Tests.ttcn b/ggsn_tests/GGSN_Tests.ttcn
index c949dc9..32d4a1d 100644
--- a/ggsn_tests/GGSN_Tests.ttcn
+++ b/ggsn_tests/GGSN_Tests.ttcn
@@ -328,7 +328,7 @@
 		};
 		[] T_default.timeout {
 			Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail,
-						"pinpong T_default timeout");
+						"pingpong T_default timeout");
 		};
 	}