One thing is for sure. If the dog did bite the child, it was an accident or warning bite. I do not see any marks on the bottom of the child's cheek. This would lead me to believe that it is a scratch. However, no bite or scratch is worth a child being hurt. I suggest you keep them apart until she get's big enough to be alone with the dog.
I'm so far Right, it's amazing I haven't fallen OVER!