From beb1ab8d64f79a74ba80d403d0b668c16c6c3be5 Mon Sep 17 00:00:00 2001
From: Tom Poole <thomas.poole@roli.com>
Date: Thu, 4 Apr 2019 11:03:26 +0100
Subject: [PATCH] Fixed a bug handling errors when detecting hosted AU
 parameters

---
 .../format_types/juce_AudioUnitPluginFormat.mm            | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/modules/juce_audio_processors/format_types/juce_AudioUnitPluginFormat.mm b/modules/juce_audio_processors/format_types/juce_AudioUnitPluginFormat.mm
index 114509db3f..55d1489037 100644
--- a/modules/juce_audio_processors/format_types/juce_AudioUnitPluginFormat.mm
+++ b/modules/juce_audio_processors/format_types/juce_AudioUnitPluginFormat.mm
@@ -1358,9 +1358,11 @@ public:
         if (audioUnit != nullptr)
         {
             UInt32 paramListSize = 0;
-            AudioUnitGetPropertyInfo (audioUnit, kAudioUnitProperty_ParameterList, kAudioUnitScope_Global,
-                                      0, &paramListSize, nullptr);
-            haveParameterList = paramListSize >= 0;
+            haveParameterList = AudioUnitGetPropertyInfo (audioUnit, kAudioUnitProperty_ParameterList, kAudioUnitScope_Global,
+                                                          0, &paramListSize, nullptr) == noErr;
+
+            if (! haveParameterList)
+                return;
 
             if (paramListSize > 0)
             {