When bl-tint2-session load tint2-sessionfile, empty line launch default tint2rc.

Description

If ~/.config/tint2/tint2-sessionfile has empty line.

When bl-tint2-session load tint2-sessionfile,

empty line got the fullPath /home/user/.config/tint2/

So it will run command as follow

tint2 -c /home/user/.config/tint2/

show message like this

...
tint2: Loading config file: /home/user/.config/tint2/
...

So i created pull request #74 to fix this situation.