Filter: added reset method on vector filters

libraries/Filter/LowPassFilter2p.cpp

@@ -86,6 +86,11 @@ T LowPassFilter2p<T>::apply(const T &sample) {
     return _filter.apply(sample, _params);
 }
 
+template <class T>
+void LowPassFilter2p<T>::reset(void) {
+    return _filter.reset();
+}
+
 /* 
  * Make an instances
  * Otherwise we have to move the constructor implementations to the header file :P

libraries/Filter/LowPassFilter2p.h

@@ -62,6 +62,7 @@ public:
     float get_cutoff_freq(void) const;
     float get_sample_freq(void) const;
     T apply(const T &sample);
+    void reset(void);
 
 protected:
     struct DigitalBiquadFilter<T>::biquad_params _params;