This fixes a bug in ENAS_DontAlign (introduced in D32733) where blank lines had an EscapedNewlineColumn of 0, causing a subtraction to overflow when converted back to unsigned and leading to runaway memory allocation.
This restores the original approach of a separate loop as originally proposed in https://reviews.llvm.org/D32733?vs=97397&id=97404, now with a proper justification :)