BlockLowPass: initialize state in definition

src/lib/controllib/BlockLowPass.hpp

@@ -66,7 +66,6 @@ public:
 // methods
 	BlockLowPass(SuperBlock *parent, const char *name) :
 		Block(parent, name),
-		_state(NAN /* initialize to invalid val, force into is_finite() check on first call */),
 		_fCut(this, "") // only one parameter, no need to name
 	{}
 	virtual ~BlockLowPass() = default;
@@ -77,7 +76,7 @@ public:
 	void setState(float state) { _state = state; }
 protected:
 // attributes
-	float _state;
+	float _state{NAN}; // initialize to invalid val, force into is_finite() check on first call
 	control::BlockParamFloat _fCut;
 };