#2016 - a few more Windows fixes

git-svn-id: https://chaste.cs.ox.ac.uk/svn/chaste/trunk@19955 b5f69653-2bf5-0310-8201-b0dafb8e1405
#2434 Allow mutable mesh to delete an element

git-svn-id: https://chaste.cs.ox.ac.uk/svn/chaste/trunk@19958 b5f69653-2bf5-0310-8201-b0dafb8e1405
#2016 - a few more Windows fixes

git-svn-id: https://chaste.cs.ox.ac.uk/svn/chaste/trunk@19963 b5f69653-2bf5-0310-8201-b0dafb8e1405
#2016 - this should fix a Windows bug, and doesn't appear to break any of the tests under Linux...

git-svn-id: https://chaste.cs.ox.ac.uk/svn/chaste/trunk@19964 b5f69653-2bf5-0310-8201-b0dafb8e1405