Made the dsp::Filter copy constructor reset the state. Also added a couple of missing move constructors to that class

modules/juce_dsp/processors/juce_IIRFilter.cpp

@@ -45,6 +45,12 @@ IIR::Coefficients<NumericType>::Coefficients (const Coefficients& other)
 {
 }
 
+template <typename NumericType>
+IIR::Coefficients<NumericType>::Coefficients (Coefficients&& other)
+    : coefficients (static_cast<Array<NumericType>&&> (other.coefficients))
+{
+}
+
 template <typename NumericType>
 IIR::Coefficients<NumericType>& IIR::Coefficients<NumericType>::operator= (const Coefficients& other)
 {
@@ -52,6 +58,13 @@ IIR::Coefficients<NumericType>& IIR::Coefficients<NumericType>::operator= (const
     return *this;
 }
 
+template <typename NumericType>
+IIR::Coefficients<NumericType>& IIR::Coefficients<NumericType>::operator= (Coefficients&& other)
+{
+	coefficients = static_cast<Array<NumericType>&&> (other.coefficients);
+    return *this;
+}
+
 template <typename NumericType>
 IIR::Coefficients<NumericType>::Coefficients (NumericType b0, NumericType b1,
                                               NumericType a0, NumericType a1)

modules/juce_dsp/processors/juce_IIRFilter.h

@@ -69,7 +69,10 @@ namespace IIR
         Filter (Coefficients<NumericType>* coefficientsToUse);
 
         /** Creates a copy of another filter. */
-        Filter (const Filter&) = default;
+        Filter (const Filter& other)  : coefficients (other.coefficients)  { reset(); }
+
+        /** Creates a copy of another filter. */
+        Filter& operator= (const Filter& other)  { coefficients = other.coefficients; reset(); }
 
         /** Move constructor. */
         Filter (Filter&&) = default;
@@ -89,10 +92,9 @@ namespace IIR
             Note that this clears the processing state, but the type of filter and
             its coefficients aren't changed.
         */
-        void reset()            { reset (SampleType {0}); }
+        void reset()            { reset ({}); }
 
         /** Resets the filter's processing pipeline to a specific value.
-
             @see reset
         */
         void reset (SampleType resetToValue);
@@ -156,11 +158,10 @@ namespace IIR
         Coefficients (NumericType b0, NumericType, NumericType b2, NumericType b3,
                       NumericType a0, NumericType a1, NumericType a2, NumericType a3);
 
-        /** Creates a copy of another filter. */
         Coefficients (const Coefficients&);
-
-        /** Creates a copy of another filter. */
+        Coefficients (Coefficients&&);
         Coefficients& operator= (const Coefficients&);
+        Coefficients& operator= (Coefficients&&);
 
         /** The Coefficients structure is ref-counted, so this is a handy type that can be used
             as a pointer to one.