This commit replaces ClearCopyStringNoFormat() with
ClearCopyStringNoFormatOrTerminate(). All calls to that function
passed an implicitly 0-terminated string as the destination, meaning
that we don't need to 0-terminate them and, in not doing, we free up a
byte to store data.
It also deduplicates code as CopyBytes(), and does a little bounds
checking before actually trying to copy.
Matt Mascarenhas
1280142d45
