StatsD_Types: Fix compiler warnings about missing record fields

StatsD_Types.ttcn: In TTCN-3 module `StatsD_Types':
 StatsD_Types.ttcn:51.1-55.1: In template definition `tr_StatsDMetric':
  StatsD_Types.ttcn:51.126-55.1: warning: Field `srate' is missing from template for record type `@StatsD_Types.StatsDMetric'
 StatsD_Types.ttcn:57.1-61.1: In template definition `tr_StatsDMetricCounter':
  StatsD_Types.ttcn:57.106-61.1: warning: Field `srate' is missing from template for record type `@StatsD_Types.StatsDMetric'
 StatsD_Types.ttcn:63.1-67.1: In template definition `tr_StatsDMetricGauge':
  StatsD_Types.ttcn:63.104-67.1: warning: Field `srate' is missing from template for record type `@StatsD_Types.StatsDMetric'

Change-Id: I6d3b40dc719b42481dacb5599eb7eeb3be0426b4
diff --git a/library/StatsD_Types.ttcn b/library/StatsD_Types.ttcn
index 2142b8c..546e469 100644
--- a/library/StatsD_Types.ttcn
+++ b/library/StatsD_Types.ttcn
@@ -51,19 +51,22 @@
 template StatsDMetric tr_StatsDMetric(template MetricName name, template MetricValue val := ?, template MetricType mtype) := {
 	name := name,
 	val := val,
-	mtype := mtype
+	mtype := mtype,
+	srate := *
 }
 
 template StatsDMetric tr_StatsDMetricCounter(template MetricName name, template MetricValue val := ?) := {
 	name := name,
 	val := val,
-	mtype := "c"
+	mtype := "c",
+	srate := *
 }
 
 template StatsDMetric tr_StatsDMetricGauge(template MetricName name, template MetricValue val := ?) := {
 	name := name,
 	val := val,
-	mtype := "g"
+	mtype := "g",
+	srate := *
 }
 
 } with { encode "TEXT" }