Correct indentation that confused me.

git-svn-id: https://chaste.cs.ox.ac.uk/svn/chaste/trunk@22629 b5f69653-2bf5-0310-8201-b0dafb8e1405
#2594 Reset Cvode if a solve fails in a tissue simulation.

git-svn-id: https://chaste.cs.ox.ac.uk/svn/chaste/trunk@22630 b5f69653-2bf5-0310-8201-b0dafb8e1405