Correctly handle empty source files in Clang-Mapped traces.
Correctly handle empty source files in Clang-Mapped traces.

seec-team/seec,seec-team/seec,mheinsen/seec,seec-team/seec,mheinsen/seec,seec-team/seec,mheinsen/seec,seec-team/seec,mheinsen/seec,mheinsen/seec