apply clang-format

Change-Id: I27aaabefca7e01a7762f50a17fb9219c19d82f1b
diff --git a/mkvmuxer/mkvmuxer.cc b/mkvmuxer/mkvmuxer.cc
index 15b9a90..137585d 100644
--- a/mkvmuxer/mkvmuxer.cc
+++ b/mkvmuxer/mkvmuxer.cc
@@ -2666,7 +2666,7 @@
   // and write it if it is okay to do so (i.e.) no other track has an held back
   // frame with timestamp <= the timestamp of the frame in question.
   std::vector<std::list<Frame*>::iterator> frames_to_erase;
-  for (std::list<Frame *>::iterator
+  for (std::list<Frame*>::iterator
            current_track_iterator = stored_frames_[track_number].begin(),
            end = --stored_frames_[track_number].end();
        current_track_iterator != end; ++current_track_iterator) {