This fixes a regression exposed by r307795 and rL308725 in which the level of a
comment line between '} else {' and a preprocessor directive is incorrectly set
as the level of the '} else {' line. For example, this :
int f(int i) { if (i) { ++i; } else { // comment #ifdef A --i; #endif } }
was formatted as:
int f(int i) { if (i) { ++i; } else { // comment #ifdef A --i; #endif } }