Added some assertions to StateVariableFilter

modules/juce_dsp/processors/juce_StateVariableFilter.h

@@ -148,6 +148,7 @@ namespace StateVariableFilter
         void processBlock (const SampleType* input, SampleType* output, size_t n) noexcept
         {
             auto state = *parameters;
+
             for (size_t i = 0 ; i < n; ++i)
                 output[i] = processLoop<type> (input[i], state);
 
@@ -187,6 +188,10 @@ namespace StateVariableFilter
         void setCutOffFrequency (double sampleRate, NumericType frequency,
                                  NumericType resonance = static_cast<NumericType> (1.0 / std::sqrt (2.0))) noexcept
         {
+            jassert (sampleRate > 0);
+            jassert (resonance > NumericType (0));
+            jassert (frequency > NumericType (0) && frequency <= NumericType (sampleRate * 0.5));
+
             g  = static_cast<NumericType> (std::tan (MathConstants<double>::pi * frequency / sampleRate));
             R2 = static_cast<NumericType> (1.0 / resonance);
             h  = static_cast<NumericType> (1.0 / (1.0 + R2 * g + g * g));