when getting an empty line check for Gl_eof(). If an eof found terminate. This...

when getting an empty line check for Gl_eof(). If an eof found terminate. This is the case when there is no more input while reading from a pipe of from a file via stdin


git-svn-id: http://root.cern.ch/svn/root/trunk@67 27541ba8-7e3a-0410-8455-c3a389f83636