[FIX] Fixed a bug where SaveBoundaryValues would segfault if the user specifies\
 a non-existent boundary variable.  Bug was unreported and so doesn't have a nu\
mber.



git-svn-id: svn://svn.code.sf.net/p/elmerfem/code/trunk@6870 04224531-1f84-46d8-96ce-875b9e37dce3