Fix null ptr exception

Author: Michael DeRoy

UnityMixedCallstackFilter.cs

@@ -29,7 +29,7 @@ public void OnLoadComplete(DkmProcess process, DkmWorkList workList, DkmEventDes
             {
                 IVsOutputWindow outWindow = Package.GetGlobalService(typeof(SVsOutputWindow)) as IVsOutputWindow;
                 Guid debugPaneGuid = VSConstants.GUID_OutWindowDebugPane;
-                outWindow.GetPane(ref debugPaneGuid, out _debugPane);
+                outWindow?.GetPane(ref debugPaneGuid, out _debugPane);
             }
         }
 
@@ -126,7 +126,7 @@ private static void RefreshStackData(int pid)
                 }
                 catch (Exception ex)
                 {
-                    _debugPane.OutputString("Unable to read dumped pmip file: " + ex.Message + "\n");
+                    _debugPane?.OutputString("Unable to read dumped pmip file: " + ex.Message + "\n");
                     DisposeStreams();
                     _enabled = false;
                     return;
@@ -156,7 +156,7 @@ private static void RefreshStackData(int pid)
             }
             catch (Exception ex)
             {
-                _debugPane.OutputString("Unable to read dumped pmip file: " + ex.Message + "\n");
+                _debugPane?.OutputString("Unable to read dumped pmip file: " + ex.Message + "\n");
                 DisposeStreams();
                 _enabled = false;
                 return;

source.extension.vsixmanifest

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <PackageManifest Version="2.0.0" xmlns="http://schemas.microsoft.com/developer/vsx-schema/2011" xmlns:d="http://schemas.microsoft.com/developer/vsx-schema-design/2011">
   <Metadata>
-    <Identity Id="UnityMixedCallstack.mderoy.1bc395e8-c1ea-4a2d-8a37-19e7f0c302b9" Version="2.2" Language="en-US" Publisher="Jb Evain, Michael DeRoy, Jonathan Chambers" />
+    <Identity Id="UnityMixedCallstack.mderoy.1bc395e8-c1ea-4a2d-8a37-19e7f0c302b9" Version="2.3" Language="en-US" Publisher="Jb Evain, Michael DeRoy, Jonathan Chambers" />
     <DisplayName>Unity Mixed Callstack</DisplayName>
     <Description xml:space="preserve">Visual Studio native debugger extension to help debug native applications using Mono. Originally developed by Jb Evain, Updated for Unity by Michael DeRoy and Jonathan Chambers</Description>
   </Metadata>