if single measure section at beginning of score followed by a section with an end repeat, then end repeat goes to start of score

Attached example repeat30:

| m1 | section_break | m2 | m3 :|

expected behavior: repeat list is m1, m2, m3, m2, m3
actual behavior on 2.0.2 and 52adf61: m1, m2, m3, m1, m2, m3

The repeat should go back to begining of m2, because there is section break at end of m1, but because m1 is a single measure at start of score, the for loop in jumpToStartRepeat has a condition to break if first measure. Fix is by moving the test for first measure to the bottom of the for loop.

I'm fixing with same PR as #73486: 1-measure repeat at end of section causes repeat list to continue afterwards because the fix is in the same little for loop in jumpToStartRepeat.