Skip logfile creation when -lt parameter is missing

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What steps will reproduce the problem?

1. Build an existing executable with map file
2. Run the executable without the parameter for logfile creation (-lt)

What is the expected output? What do you see instead?

A "Delphi-Code-Coverage-Debug.log" has been created in the output directory (as 
described by the help). In my opinion it would be reasonable to skip logfile if 
parameter -lt is missing. That is:

1) -lt is missing => no logfile
2) -lt was set without filename => default logfile
3) -lt was set with filename => use filename for log

What version of the product are you using? On what operating system?

1.0 RC8, Windows 7 Professional 64bit

Original issue reported on code.google.com by tkaelin....@gmail.com on 28 Sep 2012 at 5:53