IDE: debugger: check if exe is there only if HasExePath

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@46912 4005530d-fff6-0310-9dd1-cebe43e6787f
IDE: comment

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@46913 4005530d-fff6-0310-9dd1-cebe43e6787f