Fix an issue that produces a wrong coverage mapping when using binary
conditional operators as show in the example below.
Before this patch:
1| 1|int binary_cond(int x) {
2| 1| x = x ?: 4;
3| 1| int y = 0;
4| 0| return x; <-- Not covered
5| 1|}
After this patch:
1| 1|int binary_cond(int x) {
2| 1| x = x ?: 4;
3| 1| int y = 0;
4| 1| return x; <-- Covered
5| 1|}