Windows alignment warnings

[Frank Dellaert]

When building check target on MSVC 2017, still many warnings about alignment. Same for several examples. Many seem related to numericalDerivative.

Warnings do not seem to affect running examples.

Looking for Windows user to look into.

[José Luis Blanco-Claraco]

Hi,

I've fixed this in another project with an target_compile_definitions. It could be solved with:

if (MSVC)
        target_compile_definitions(gtsam PUBLIC -D_ENABLE_EXTENDED_ALIGNED_STORAGE)
endif()

Cheers