Correct fix for int/size_t mismatch.
Correct fix for int/size_t mismatch.

john-lynch/GSL,kernhanda/GSL,kevgs/GSL,vladon/GSL,neilmacintosh/GSL,jbcoe/GSL,eteran/GSL,trebconnell/GSL,nguarracino/GSL,Josaphat/GSL,martinmoene/GSL,bashrc-real/GSL,matus-chochlik/GSL,garyfurnish/GSL,s8435330song/GSL