Merge pull request Azure#3913 from markcowl/stragenull

Add null check for storage context

Author: markcowl

src/Storage/Commands.Storage/Blob/Cmdlet/StartAzureStorageBlobCopy.cs

@@ -285,7 +285,7 @@ public override void ExecuteCmdlet()
                     break;
 
                 case UriParameterSet:
-                    copyAction = () => StartCopyBlob(destChannel, AbsoluteUri, DestContainer, DestBlob, GetCmdletStorageContext(Context));
+                    copyAction = () => StartCopyBlob(destChannel, AbsoluteUri, DestContainer, DestBlob, (Context != null? GetCmdletStorageContext(Context) : null));
                     target = AbsoluteUri;
                     break;
 

src/Storage/Commands.Storage/Blob/Cmdlet/StartAzureStorageBlobIncrementalCopy.cs

@@ -216,7 +216,7 @@ public override void ExecuteCmdlet()
                     break;
 
                 case UriParameterSet:
-                    copyAction = () => StartCopyBlob(destChannel, AbsoluteUri, DestContainer, DestBlob, new AzureStorageContext(Context.GetCloudStorageAccount()));
+                    copyAction = () => StartCopyBlob(destChannel, AbsoluteUri, DestContainer, DestBlob, (Context != null? GetCmdletStorageContext(Context): null));
                     target = AbsoluteUri;
                     break;