Fixed an IAA namespacing issue

modules/juce_audio_plugin_client/Standalone/juce_StandaloneFilterApp.cpp

@@ -129,8 +129,12 @@ protected:
     ScopedPointer<StandaloneFilterWindow> mainWindow;
 };
 
+} // namespace juce
+
 #if JucePlugin_Build_Standalone && JUCE_IOS
 
+using namespace juce;
+
 bool JUCE_CALLTYPE juce_isInterAppAudioConnected()
 {
     if (auto holder = StandalonePluginHolder::getInstance())
@@ -156,6 +160,4 @@ Image JUCE_CALLTYPE juce_getIAAHostIcon (int size)
 #endif
 #endif
 
-} // namespace juce
-
 #endif