fix warning C4702: unreachable code

[x1sc0]

it fixes

E:\jenkins\workspace\gerrit_windows_wsl\workdir\UnpackedTarball\fast_float\include\fast_float\float_common.h(317) : error C2220: the following warning is treated as an error
E:\jenkins\workspace\gerrit_windows_wsl\workdir\UnpackedTarball\fast_float\include\fast_float\float_common.h(373) : error C2220: the following warning is treated as an error
E:\jenkins\workspace\gerrit_windows_wsl\workdir\UnpackedTarball\fast_float\include\fast_float\float_common.h(317) : warning C4702: unreachable code
E:\jenkins\workspace\gerrit_windows_wsl\workdir\UnpackedTarball\fast_float\include\fast_float\float_common.h(373) : warning C4702: unreachable code

[lemire]

Running tests.

[thbeu]

See #367. Only occurs with warning level /W4.

It can be simply circumvented by consumers via

#ifdef _MSC_VER
#pragma warning(push)
#pragma warning(disable: 4702) // unreachable code
#endif
#include "fast_float.h"
#ifdef _MSC_VER
#pragma warning(pop)
#endif

At least, that's what was working for me.

[lemire]

I am happy to merge this.

[lemire]

Will be part of the next release.