Fixed error when assigning ``None`` as filters to a Bundle.
Fixed error when assigning ``None`` as filters to a Bundle.

glorpen/webassets,heynemann/webassets,john2x/webassets,glorpen/webassets,0x1997/webassets,wijerasa/webassets,heynemann/webassets,glorpen/webassets,john2x/webassets,JDeuce/webassets,scorphus/webassets,0x1997/webassets,rs/webassets,aconrad/webassets,florianjacob/webassets,aconrad/webassets,heynemann/webassets,scorphus/webassets,wijerasa/webassets,JDeuce/webassets,florianjacob/webassets,aconrad/webassets