AU: Don't set kAudioUnitProperty_AudioChannelLayout property on plug-ins that don't support it

modules/juce_audio_processors/format_types/juce_AudioUnitPluginFormat.mm

@@ -781,19 +781,19 @@ public:
 
                         // try to convert the layout into a tag
                         actualTag = CoreAudioLayouts::toCoreAudio (CoreAudioLayouts::fromCoreAudio (layout));
-                    }
 
-                    if (actualTag != requestedTag)
-                    {
-                        zerostruct (layout);
-                        layout.mChannelLayoutTag = requestedTag;
+                        if (actualTag != requestedTag)
+                        {
+                            zerostruct (layout);
+                            layout.mChannelLayoutTag = requestedTag;
 
-                        err = AudioUnitSetProperty (audioUnit, kAudioUnitProperty_AudioChannelLayout, scope, static_cast<UInt32> (i), &layout, minDataSize);
+                            err = AudioUnitSetProperty (audioUnit, kAudioUnitProperty_AudioChannelLayout, scope, static_cast<UInt32> (i), &layout, minDataSize);
 
-                        // only bail out if the plug-in claims to support layouts
-                        // See AudioUnit headers on kAudioUnitProperty_AudioChannelLayout
-                        if (err != noErr && supportsLayouts && isInitialized)
-                            return false;
+                            // only bail out if the plug-in claims to support layouts
+                            // See AudioUnit headers on kAudioUnitProperty_AudioChannelLayout
+                            if (err != noErr && supportsLayouts && isInitialized)
+                                return false;
+                        }
                     }
                 }
             }