pgw: Improve checks around Gy messages

Change-Id: Ica3ca4cf72113d66e74dcff9f838e39cc5d63468
diff --git a/pgw/regen_makefile.sh b/pgw/regen_makefile.sh
index ce59dfb..5edcaef 100755
--- a/pgw/regen_makefile.sh
+++ b/pgw/regen_makefile.sh
@@ -19,6 +19,7 @@
 	Native_FunctionDefs.cc
 	TCCConversion.cc
 	TCCInterface.cc
+	TCCEncoding.cc
 	UDP_EncDec.cc
 	UECUPS_CodecPort_CtrlFunctDef.cc
 "