Two minor nits and a real bug fix.
Two minor nits and a real bug fix.

* buckets/aggregate_buckets.c
  (read_aggregate): Avoid needless set of *len = 0 when we already know that
  it must be set to 0 (otherwise this clause wouldn't have triggered).
  (serf_aggregate_read_iovec): Ensure i gets incremented even if we get a
  non-zero status return.

zhengcq315/serf,blueszhangsh/serf,blueszhangsh/serf,wzugang/serf,soufianeEL/serf,TommyU/serf,wzugang/serf,krime/serf,sworda/serf,zhupan/serf,soufianeEL/serf,KyleSanderson/serf,krime/serf,x-clone/serf,zhengcq315/serf,alex1818/serf,zhupan/serf,muthusuba/serf,sworda/serf,blueszhangsh/serf,sworda/serf,muthusuba/serf,stoneCC/serf,yesoce/serf,Manouchehri/serf,wzugang/serf,KyleSanderson/serf,x-clone/serf,lazysoez/serf,justinweb/serf,lazysoez/serf,liuzongquan/serf,stoneCC/serf,TommyU/serf,alex1818/serf,TommyU/serf,SirJson/serf,Manouchehri/serf,muthusuba/serf,google-code-export/serf,lazysoez/serf,yesoce/serf,SirJson/serf,alex1818/serf,pengdu/serf,TommyU/serf,pengdu/serf,sworda/serf,stoneCC/serf,zhengcq315/serf,muthusuba/serf,stoneCC/serf,krime/serf,idomon/serf,soufianeEL/serf,soufianeEL/serf,Manouchehri/serf,blueszhangsh/serf,liuzongquan/serf,Manouchehri/serf,google-code-export/serf,google-code-export/serf,idomon/serf,justinweb/serf,yesoce/serf,justinweb/serf,KyleSanderson/serf,pengdu/serf,justinweb/serf,zhupan/serf,lazysoez/serf,zhengcq315/serf,idomon/serf,idomon/serf,liuzongquan/serf,zhupan/serf,alex1818/serf,KyleSanderson/serf,SirJson/serf,x-clone/serf,krime/serf,wzugang/serf,pengdu/serf,x-clone/serf,liuzongquan/serf,yesoce/serf,SirJson/serf,google-code-export/serf