Skip last comma when there are no extensions

This is to get rid of the GCC warning:
"warning: comma at end of enumerator list [-Wpedantic]"
diff --git a/tests/42-real-life-OK.asn1.-PR b/tests/42-real-life-OK.asn1.-PR
index d223133..11531cf 100644
--- a/tests/42-real-life-OK.asn1.-PR
+++ b/tests/42-real-life-OK.asn1.-PR
@@ -353,7 +353,7 @@
 typedef enum VariablePart_PR {
 	VariablePart_PR_NOTHING,	/* No components present */
 	VariablePart_PR_vset,
-	VariablePart_PR_vrange,
+	VariablePart_PR_vrange
 	/* Extensions may appear below */
 	
 } VariablePart_PR;