Signed/unsigned conversion in Boost.Python

[christian-uehara]

Using Boost v1.90

In boost/include/boost/python/suite/indexing/detail/indexing_suite_detail.hpp there are locals that have a signed/unsigned mismatch.

On L176, a local variable index declared as long is assigned to a return that can be unsigned (size_t).

Similarly, on L611, another local variable from is declared as long then operator+= is used for a variable that has an unsigned type.

This results in an unnecessarily wordy warning in the compiler (in my case msvc 14.2)