Fix seg fault in GetOnuOmciState()

Change-Id: I72f9810fd0a3666dd41f435568d0ea761e33ad12
diff --git a/omci_state.go b/omci_state.go
index 4aedd28..8e4af35 100644
--- a/omci_state.go
+++ b/omci_state.go
@@ -39,11 +39,12 @@
 }
 
 func GetOnuOmciState(onuId uint32, intfId uint32) istate {
-	/*
-		key := OnuKey{intfId, onuId}
-		return (OnuOmciStateMap[key].state)
-	*/
-	return INCOMPLETE
+	key := OnuKey{intfId, onuId}
+	if onu, ok := OnuOmciStateMap[key]; ok {
+		return onu.state
+	} else {
+		return INCOMPLETE
+	}
 }
 
 func GetGemPortId(onuId uint32, intfId uint32) uint16 {