[AUCTeX] displaying line numbers > 9999 in TeX Error Overview

[jfbu]

hi,

this is from  TeX error overview buffer

 blender_manual.tex        2375 Error   Package inputenc Error: Unicode char ▸ 
(U+25B8)
 blender_manual.tex        1... Error   Package inputenc Error: Unicode char ⏮ 
(U+23EE)

one sees that line number >= 10000 gets displayed as 1...

the jump to the file and to the log work fine, but I wanted to copy paste to 
help the author of the document and this makes it more difficult

this document has 111915 lines (whoosh...) and has errors all the way to the 
end (of the above type, of the type of using svg or gif image files, of various 
perhaps a missing \item (that's wrapfig fault) and, sadly some dimension too 
large error (due to gigantic jpeg files).

It would be nice to get the 5 digits line numbers in TeX Error Overview...

Is there a way to configure AUCTeX to display them ?

best

Jean-François