Fix a bug in AutoDiffManifold

When computing the MinusJacobian we were passing two different
values to AutoDifferentiate for the output dimension. The template
argument was correct which is why the method was working correctly
but the function argument was incorrect (cut and paste error).

This would be fine in release mode, but in debug mode it would
trigger a check failure.

Change-Id: I0327656d1a4d34c82e4d3a8c04f27c264bce80eb

include/ceres/autodiff_manifold.h

diff --git a/include/ceres/autodiff_manifold.h b/include/ceres/autodiff_manifold.h
index b2f5c9d..8a7601f 100644
--- a/include/ceres/autodiff_manifold.h
+++ b/include/ceres/autodiff_manifold.h
@@ -249,7 +249,7 @@
       internal::StaticParameterDims<kAmbientSize, kAmbientSize>>(
       internal::MinusWrapper<Functor>(*functor_),
       parameter_ptrs,
-      kAmbientSize,
+      kTangentSize,
       y_minus_x,
       jacobian_ptrs);
 }