filter/convert: call PcmConvert::Flush() only if initialized

Fixes another part of #208, the one which caused the bogus exception.

filter/convert: call PcmConvert::Flush() only if initialized
9ce6828d · Max Kellermann · 7ff5cf83 · 9ce6828d
Commit 9ce6828d authored Jan 29, 2018 by Max Kellermann
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ConvertFilterPlugin.cxx src/filter/plugins/ConvertFilterPlugin.cxx +3 -1

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--- a/src/filter/plugins/ConvertFilterPlugin.cxx
+++ b/src/filter/plugins/ConvertFilterPlugin.cxx
@@ -57,7 +57,9 @@ public:
 	ConstBuffer<void> FilterPCM(ConstBuffer<void> src) override;

 	ConstBuffer<void> Flush() override {
-		return state.Flush();
+		return IsActive()
+			? state.Flush()
+			: nullptr;
 	}

 private: