fix dialyzer problems in yaws_sendfile changes
fix dialyzer problems in yaws_sendfile changes

leoliu/yaws,sebgod/yaws,klacke/yaws,watonyweng/yaws,treacheroustalks/yaws,klacke/yaws,bsmr-erlang/yaws,weisslj/yaws,leoliu/yaws,klacke/yaws,imtal/yaws,watonyweng/yaws,patternmatched/yaws,weisslj/yaws,ca91/yaws,sebgod/yaws,leoliu/yaws,imtal/yaws,ca91/yaws,toraritte/azith,treacheroustalks/yaws,toraritte/azith,capflam/yaws,watonyweng/yaws,sebgod/yaws,andreineculau/yaws,watonyweng/yaws,weisslj/yaws,weisslj/yaws,zephyrean/yaws,jgrinstead/yaws,leoliu/yaws,zephyrean/yaws,zephyrean/yaws,sebgod/yaws,jgrinstead/yaws,sebgod/yaws,zephyrean/yaws,zephyrean/yaws,andreineculau/yaws,ca91/yaws,capflam/yaws,phonohawk/yaws,watonyweng/yaws,zephyrean/yaws,weisslj/yaws,jgrinstead/yaws,bsmr-erlang/yaws,namjae/yaws,toraritte/azith,andreineculau/yaws,bsmr-erlang/yaws,treacheroustalks/yaws,namjae/yaws,namjae/yaws,watonyweng/yaws,phonohawk/yaws,patternmatched/yaws,phonohawk/yaws,klacke/yaws,patternmatched/yaws,bsmr-erlang/yaws,imtal/yaws,ca91/yaws,patternmatched/yaws,toraritte/azith,klacke/yaws,namjae/yaws,toraritte/azith,capflam/yaws,capflam/yaws,phonohawk/yaws,jgrinstead/yaws,bsmr-erlang/yaws,zephyrean/yaws,weisslj/yaws,leoliu/yaws,ca91/yaws,capflam/yaws,capflam/yaws,leoliu/yaws,imtal/yaws,namjae/yaws,phonohawk/yaws,imtal/yaws,ca91/yaws,leoliu/yaws,patternmatched/yaws,andreineculau/yaws,imtal/yaws,bsmr-erlang/yaws,weisslj/yaws,klacke/yaws,phonohawk/yaws,ca91/yaws,watonyweng/yaws,patternmatched/yaws,jgrinstead/yaws,toraritte/azith,toraritte/azith,namjae/yaws,namjae/yaws,patternmatched/yaws,andreineculau/yaws,sebgod/yaws,sebgod/yaws,treacheroustalks/yaws,bsmr-erlang/yaws,imtal/yaws,capflam/yaws,klacke/yaws,jgrinstead/yaws,phonohawk/yaws,jgrinstead/yaws