Cast size_t to ptr_diff_t for pointer arithmetic.
Cast size_t to ptr_diff_t for pointer arithmetic.

hsorby/libcellml,nickerso/libcellml,hsorby/libcellml,nickerso/libcellml,cellml/libcellml,cellml/libcellml,cellml/libcellml,hsorby/libcellml,nickerso/libcellml,hsorby/libcellml,nickerso/libcellml,cellml/libcellml