The Clydesdale Bank Premier League clash ended in stalemate at Easter Road after Leigh Griffiths was denied what would have been the match-winner.
His ferocious free-kick after 77 minutes crashed off the underside of the crossbar before crossing the line but was not given by referee Euan Norris or his assistant.
Asked for his views on the incident, Locke said: "From where I was, it was difficult to see.
"I've just seen it again and obviously it's in but the referee didn't give it and that's the most important thing. There is no point in me sitting here worrying about it.
"It was a great strike and it went over the line and it's one we've got away with so maybe the luck is turning for us now."
Former Dundee United boss Peter Houston has been linked with the vacant manager's position ahead of next weekend's Scottish Communities League Cup final against St Mirren.
Locke added: "I know Housty well, he was the youth coach when I played here so we go back a long way. But, until we are told anything differently, we will just carry on.
"If they bring somebody new in, then great. If not, we'll just prepare the team as normal for the next game."