I came across a thread with a similar situation:
http://talk.collegeconfidential.com/uc-transfers/1644565-please-help-me-ucb-conditions-of-admission-p1.html
According to the thread, the poster was able to keep his/her offer as long as the combined GPA for winter and spring was 3.0. I don’t know the same would apply to OP, but it at least gives some insight.