Fixed a typo in JACK code.

modules/juce_audio_devices/native/juce_linux_JackAudio.cpp

@@ -368,7 +368,7 @@ private:
 
         if (callback != nullptr)
         {
-            if ((numActiveInputChannels + numActiveOutputChannels) > 0)
+            if ((numActiveInChans + numActiveOutChans) > 0)
                 callback->audioDeviceIOCallback (const_cast <const float**> (inChans.getData()), numActiveInChans,
                                                  outChans, numActiveOutChans, numSamples);
         }