Fix bug #37: run-local-test.sh 0 runs all local tests

Change-Id: I247de29b73a4bf76de2d5f56d2481379f5c126c1
Reviewed-on: http://naan.mimuw.edu.pl:8001/105
Tested-by: Nebulostore Nebulostore <nebulostore@gmail.com>
Reviewed-by: Bolek Kulbabinski <bkulbabinski@gmail.com>