Cut across shorty...I believe you are right. I shouldn't have said "regardless of when it is called"...I meant prior to the 9th. Extra innings would count I believe also. Here is the rule I found:
When wagering on total runs (over/under) the game must go 9 innings (8.5 if the home team is ahead) to have action. If a game is called or suspended in extra innings, the score will be determined after the last full inning unless the home team scores to tie, or takes the lead in the bottom half of the inning, in which case the score is determined at the time the game is called.