Fix loading texture patterns in presets with empty PatternMD5 field
Some old Deevad's presets have empty PatternMD5 field set, we shouldn't skip them from loading, because they still have both, the filename and the (embedded) pattern itself.
Some old Deevad's presets have empty PatternMD5 field set, we shouldn't skip them from loading, because they still have both, the filename and the (embedded) pattern itself.