[Bug-glpk] some original variable names lost in mps output

[Alex]

I suspect the following issue to be a bug:

When over 9999 variables or constraints are generated in a MathProg model, 
which is then converted to mps format with:

glpsol --math --check --orig --wmps foo.mps foo.mod

only the first 9999 variables and constraints appear with their original 
name in the mps file, the others being shown in their internal 
representation RXXXXXX. Unlike the case for the lpx files, this does not 
appear to be an issue of filename lenght or of the "[" characters being 
forbiden.

Thanks!