Return 1 as Invoice#direct_account_factor if there is no direct_account set.
Return 1 as Invoice#direct_account_factor if there is no direct_account set.

wtag/bookyt,gaapt/bookyt,xuewenfei/bookyt,huerlisi/bookyt,huerlisi/bookyt,gaapt/bookyt,huerlisi/bookyt,xuewenfei/bookyt,hauledev/bookyt,hauledev/bookyt,wtag/bookyt,gaapt/bookyt,silvermind/bookyt,silvermind/bookyt,hauledev/bookyt,gaapt/bookyt,wtag/bookyt,silvermind/bookyt,xuewenfei/bookyt,silvermind/bookyt,hauledev/bookyt