bug#26779: expr length

[Assaf Gordon]

> On May 9, 2017, at 03:04, Assaf Gordon <address@hidden> wrote:
> 
> Attached a draft patch implementing multibyte support for 'expr'
> (it doesn't need any code from my previous multibyte stuff, so I'm sending it 
> separately).
> [...]
> 
> <0001-expr-add-multibyte-support.patch.gz>

Re-reading the patch, I see there's a memory leak when 'mbs_logical_substr' is 
called.
I'll send updated version soon (if you have more comments, please send).