CERES_DONT_HAVE_PROTOCOL_BUFFERS -> CERES_NO_PROTOCOL_BUFFERS.

Change-Id: I6c9f50e4c006faf4e75a8f417455db18357f3187
diff --git a/internal/ceres/triplet_sparse_matrix.cc b/internal/ceres/triplet_sparse_matrix.cc
index 4060907..ed8677e 100644
--- a/internal/ceres/triplet_sparse_matrix.cc
+++ b/internal/ceres/triplet_sparse_matrix.cc
@@ -82,7 +82,7 @@
   CopyData(orig);
 }
 
-#ifndef CERES_DONT_HAVE_PROTOCOL_BUFFERS
+#ifndef CERES_NO_PROTOCOL_BUFFERS
 TripletSparseMatrix::TripletSparseMatrix(const SparseMatrixProto& outer_proto) {
   CHECK(outer_proto.has_triplet_matrix());
 
@@ -214,7 +214,7 @@
   }
 }
 
-#ifndef CERES_DONT_HAVE_PROTOCOL_BUFFERS
+#ifndef CERES_NO_PROTOCOL_BUFFERS
 void TripletSparseMatrix::ToProto(SparseMatrixProto *proto) const {
   proto->Clear();