Added CERES_ prefix to the DISALLOW macros.

Change-Id: Ib81e9112e8bbc6ed6cb52f21825df0f6e659be51
diff --git a/internal/ceres/sparse_normal_cholesky_solver.h b/internal/ceres/sparse_normal_cholesky_solver.h
index 5445559..e38f39b 100644
--- a/internal/ceres/sparse_normal_cholesky_solver.h
+++ b/internal/ceres/sparse_normal_cholesky_solver.h
@@ -82,7 +82,7 @@
 
 
   const LinearSolver::Options options_;
-  DISALLOW_COPY_AND_ASSIGN(SparseNormalCholeskySolver);
+  CERES_DISALLOW_COPY_AND_ASSIGN(SparseNormalCholeskySolver);
 };
 
 }  // namespace internal