Merge pull request #51 from mattbrailsford/patch-2

Null check `blockEditorValue.Settings` before concatenating with `blockEditorValue.Content`

Author: AndyButland

src/Umbraco.Deploy.Contrib/ValueConnectors/BlockEditorValueConnector.cs

@@ -69,7 +69,7 @@ public virtual string ToArtifact(object value, IPropertyType propertyType, IColl
                 return null;
             }
 
-            var allBlocks = blockEditorValue.Content.Concat(blockEditorValue.Settings).ToList();
+            var allBlocks = blockEditorValue.Content.Concat(blockEditorValue.Settings ?? Enumerable.Empty<Block>()).ToList();
 
             // get all the content types used in block editor items
             var allContentTypes = allBlocks.Select(x => x.ContentTypeKey)
@@ -148,7 +148,7 @@ public virtual object FromArtifact(string value, IPropertyType propertyType, obj
             if (blockEditorValue == null)
                 return value;
 
-            var allBlocks = blockEditorValue.Content.Concat(blockEditorValue.Settings).ToList();
+            var allBlocks = blockEditorValue.Content.Concat(blockEditorValue.Settings ?? Enumerable.Empty<Block>()).ToList();
 
             var allContentTypes = allBlocks.Select(x => x.ContentTypeKey)
                 .Distinct()