allow empty writes; passing vectors with the total size being zero is permitted anyways
allow empty writes; passing vectors with the total size being zero is permitted anyways

h2o/h2o,yannick/h2o,yannick/h2o,h2o/h2o,yannick/h2o,devnexen/h2o,yannick/h2o,cwyang/h2o,yannick/h2o,h2o/h2o,yannick/h2o,cwyang/h2o,h2o/h2o,h2o/h2o,h2o/h2o,devnexen/h2o,cwyang/h2o,h2o/h2o,yannick/h2o,cwyang/h2o,devnexen/h2o,cwyang/h2o,yannick/h2o,devnexen/h2o,h2o/h2o,devnexen/h2o,yannick/h2o,cwyang/h2o,devnexen/h2o,devnexen/h2o,devnexen/h2o,h2o/h2o,cwyang/h2o,devnexen/h2o,cwyang/h2o