Should send op, not opts to the default formatter

opt isn't desired; it's an $.extend of {rowId: rowId, colModel:cm, gid:ts.p.id, pos:colpos }; and the defaults, but it doesn't include colModel.formatoptions.  I'm assuming most people override the defaults and don't notice this.

As you can see in the other formatters, the local op variable contains the desired colModel.formatoptions