[Help-glpk] matrix size and allocation

[ciol]

Hi,

I allocate my matrix with the size I need (and not with something like 
ia[1000+1], ja[1000+1], as shown in the first example of the doc).

But, later in my algorithm, I add some more columns:
glp_add_cols() and glp_set_mat_col()

Should I have allocated my matrix with a larger size?