Fixed bug in ibpm.cc.  Previous changes to save/load SFD filtered state caused bus errors when restarting other simulations.  Changed the conditions on the save/load of xhat to be dependent on the model type (nonlinear, linear, sfd, etc.) rather than the value of chi.
Fixed bug in ibpm.cc.  Previous changes to save/load SFD filtered state caused bus errors when restarting other simulations.  Changed the conditions on the save/load of xhat to be dependent on the model type (nonlinear, linear, sfd, etc.) rather than the value of chi.

git-svn-id: 0df3d21deda237bdb68c105db3677c34a480bda5@315 f381375e-2823-4fb2-bad6-22fa55754e8c

cwrowley/ibpm,cwrowley/ibpm,cwrowley/ibpm