Merge pull request #497 from iouri-s/patch-1

Deal with missing HKEY_CURRENT_USER\Software\Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\TrayNotify

src/Squirrel/TrayHelper.cs

@@ -78,7 +78,7 @@ public unsafe void RemoveDeadEntries(List<string> executablesInPackage, string r
                 return;
             }
 
-            if (iconStreamData.Length < 20) return;
+            if (iconStreamData == null || iconStreamData.Length < 20) return;
             var toKeep = new List<byte[]>();
             var header = default(IconStreamsHeader);