Prevent crash when there is no camera device available

If you try to use QAudioInputSelectorControl with the iOS Simulator then
it would crash as there is no camera device available. This prevents a
crash from happening in that case.

Change-Id: I3904f3d299a11a6df21e66a1138a4319cc0b8a5c
Reviewed-by: Andy Nichols <andy.nichols@digia.com>

diff --git a/src/plugins/avfoundation/camera/avfaudioinputselectorcontrol.mm b/src/plugins/avfoundation/camera/avfaudioinputselectorcontrol.mm
index 6c6df51..4a2f068 100644 (file)
--- a/src/plugins/avfoundation/camera/avfaudioinputselectorcontrol.mm
+++ b/src/plugins/avfoundation/camera/avfaudioinputselectorcontrol.mm
@@ -60,7 +60,8 @@ AVFAudioInputSelectorControl::AVFAudioInputSelectorControl(AVFCameraService *ser
                                     QString::fromUtf8([[device localizedName] UTF8String]));
     }
 
-    m_activeInput = m_devices.first();
+    if (m_devices.size() > 0)
+        m_activeInput = m_devices.first();
 }
 
 AVFAudioInputSelectorControl::~AVFAudioInputSelectorControl()
@@ -79,7 +80,7 @@ QString AVFAudioInputSelectorControl::inputDescription(const QString &name) cons
 
 QString AVFAudioInputSelectorControl::defaultInput() const
 {
-    return m_devices.first();
+    return m_devices.size() > 0 ? m_devices.first() : QString();
 }
 
 QString AVFAudioInputSelectorControl::activeInput() const