Removing a key from its parent RegContainer value removes a zero char too much

[Andreas Schnellbacher]

After executing

NepmdDeleteConfigTree \NEPMD\User\AutoRestore

the section RegKey is OK, but in RegContainer, the entry for \NEPMD\User was changed from

AutoRestore.AutoSave.Backup.Colors. ... .Toolbar.

to

AutoSaveBackup.Colors. ... .Toolbar.

(zero chars replaced by single dots).

The faulty function is _removeKeyFromContainerList of libreg.c, which exists for a long time.

The removed RegKeys are:

\NEPMD\User\AutoRestore\Ring\LoadLast
\NEPMD\User\AutoRestore\Ring\MaxFiles
\NEPMD\User\AutoRestore\Ring\SaveLast

The removed RegContainer keys are:

\NEPMD\User\AutoRestore\Ring
\NEPMD\User\AutoRestore

It may have relevance that two container levels were removed.

Luckily, this bug didn't appear until now. It has to be fixed before the deletion of a tree will be added to ImportUserTextConfig, triggered by a DELETE: value in user.cfg.