Fix factor_diff_drive test

test/gtest_factor_diff_drive.cpp

@@ -444,7 +444,7 @@ TEST(FactorDiffDrive, preintegrate_and_solve_sensor_intrinsics_gt)
     Vector3d x1(1.5, -1.5, -M_PI/2.0);
     Vector3d x2(3.0, -3.0, 0.0);
     // Matrix3d P0; P0.setIdentity();
-    VectorComposite s0(Vector3d(0,0,0), "PO", {2,1});
+    VectorComposite s0(Vector3d(0.1,0.1,0.1), "PO", {2,1});
 
     // set prior at t=0 and processor origin
     auto F0 = problem->setPriorFactor(x0, s0, t, 0.1);