Fix a memory leak in the LM strategy test.
Fix a memory leak in the LM strategy test.

Change-Id: I7c4ed74dee60f869fee9395b74a9dfc77703f2ee

ikoruk/ceres-solver,whuaegeanse/ceres-solver,jmwalls/ceres-solver-fork,stonier/ceres_solver,ysonggit/ceres-solver,timfel/ceres-bin,kartikkumar/ceres-solver,ysonggit/ceres-solver,ysonggit/ceres-solver,timfel/ceres-bin,DougFirErickson/ceres-solver,stonier/ceres_solver,jmwalls/ceres-solver-fork,entylop/ceres-solver,ikoruk/ceres-solver,ikoruk/ceres-solver,DougFirErickson/ceres-solver,whuaegeanse/ceres-solver,whuaegeanse/ceres-solver,ikoruk/ceres-solver,whuaegeanse/ceres-solver,stonier/ceres_solver,timfel/ceres-bin,kartikkumar/ceres-solver,DougFirErickson/ceres-solver,DougFirErickson/ceres-solver,entylop/ceres-solver,ysonggit/ceres-solver,jmwalls/ceres-solver-fork,jmwalls/ceres-solver-fork,entylop/ceres-solver,kartikkumar/ceres-solver,timfel/ceres-bin,ikoruk/ceres-solver,kartikkumar/ceres-solver,stonier/ceres_solver,entylop/ceres-solver