If no chunk or empty chunk argument is used for RequesetHandler:write, just return.
If no chunk or empty chunk argument is used for RequesetHandler:write, just return.

YuanPeir-Chen/turbo-support-mipsel,zcsteele/turbo,ddysher/turbo,zcsteele/turbo,luastoned/turbo,kernelsauce/turbo,luastoned/turbo,mniestroj/turbo,ddysher/turbo,YuanPeir-Chen/turbo-support-mipsel