[Camera] Fix null reference bug (#1234)

diff --git a/src/Tizen.Multimedia.Camera/Camera/CameraCapabilities.cs b/src/Tizen.Multimedia.Camera/Camera/CameraCapabilities.cs
index 6c84c48..a7f9192 100644 (file)
--- a/src/Tizen.Multimedia.Camera/Camera/CameraCapabilities.cs
+++ b/src/Tizen.Multimedia.Camera/Camera/CameraCapabilities.cs
@@ -538,7 +538,7 @@ namespace Tizen.Multimedia
         {
             get
             {
-                if (_ptzTypes.Count == 0)
+                if (_ptzTypes == null)
                 {
                     _ptzTypes = GetSupportedPtzTypes();
                 }