[BUG] Fails to build on Gentoo with clang-17

[NHOrus]

As part of preparing for future mandatory errors in gcc-14, we are rebuilding software with increased amount of warnings.

https://bugs.gentoo.org/919287

This failure happens on Gentoo with Clang-17, and most likely would happen on incoming GCC-14

Errors of compilation:

/var/tmp/portage/games-engines/odamex-10.4.0-r2/work/odamex-src-10.4.0/common/m_wdlstats.cpp:181:6: error: non-constant-expression cannot be narrowed from type 'size_type' (aka 'unsigned long') to 'int' in initializer list [-Wc++11-narrowing]
  181 |             ::wdlplayers.size() + 1,
      |             ^~~~~~~~~~~~~~~~~~~~~~~
/var/tmp/portage/games-engines/odamex-10.4.0-r2/work/odamex-src-10.4.0/common/m_wdlstats.cpp:181:6: note: insert an explicit cast to silence this issue
  181 |             ::wdlplayers.size() + 1,
      |             ^~~~~~~~~~~~~~~~~~~~~~~
      |             static_cast<int>(      )
/var/tmp/portage/games-engines/odamex-10.4.0-r2/work/odamex-src-10.4.0/common/m_wdlstats.cpp:213:35: error: non-constant-expression cannot be narrowed from type 'size_type' (aka 'unsigned long') to 'int' in initializer list [-Wc++11-narrowing]
  213 |         WDLPlayerSpawn wdlplayerspawn = {::wdlplayerspawns.size() + 1, mthing->x, mthing->y,
      |                                          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/var/tmp/portage/games-engines/odamex-10.4.0-r2/work/odamex-src-10.4.0/common/m_wdlstats.cpp:213:35: note: insert an explicit cast to silence this issue
  213 |         WDLPlayerSpawn wdlplayerspawn = {::wdlplayerspawns.size() + 1, mthing->x, mthing->y,
      |                                          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                                          static_cast<int>(           )
/var/tmp/portage/games-engines/odamex-10.4.0-r2/work/odamex-src-10.4.0/common/m_wdlstats.cpp:280:31: error: non-constant-expression cannot be narrowed from type 'size_type' (aka 'unsigned long') to 'int' in initializer list [-Wc++11-narrowing]
  280 |         WDLItemSpawn wdlitemspawn = {::wdlitemspawns.size() + 1, target->x, target->y,
      |                                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
/var/tmp/portage/games-engines/odamex-10.4.0-r2/work/odamex-src-10.4.0/common/m_wdlstats.cpp:280:31: note: insert an explicit cast to silence this issue
  280 |         WDLItemSpawn wdlitemspawn = {::wdlitemspawns.size() + 1, target->x, target->y,
      |                                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
      |                                      static_cast<int>(         )

/var/tmp/portage/games-engines/odamex-10.4.0-r2/work/odamex-src-10.4.0/common/p_acs.cpp:1927:17: error: non-constant-expression cannot be narrowed from type 'uint32_t' (aka 'unsigned int') to 'int' in initializer list [-Wc++11-narrowing]
 1927 |                 int argv[] = {actor->netid, special, arg1, arg2, arg3, arg4, arg5};
      |                               ^~~~~~~~~~~~
/var/tmp/portage/games-engines/odamex-10.4.0-r2/work/odamex-src-10.4.0/common/p_acs.cpp:1927:17: note: insert an explicit cast to silence this issue
 1927 |                 int argv[] = {actor->netid, special, arg1, arg2, arg3, arg4, arg5};
      |                               ^~~~~~~~~~~~
      |                               static_cast<int>( )
/var/tmp/portage/games-engines/odamex-10.4.0-r2/work/odamex-src-10.4.0/common/p_acs.cpp:1961:17: error: non-constant-expression cannot be narrowed from type 'long' to 'int' in initializer list [-Wc++11-narrowing]
 1961 |                 int argv[] = {sec - sectors, index};
      |                               ^~~~~~~~~~~~~
/var/tmp/portage/games-engines/odamex-10.4.0-r2/work/odamex-src-10.4.0/common/p_acs.cpp:1961:17: note: insert an explicit cast to silence this issue
 1961 |                 int argv[] = {sec - sectors, index};
      |                               ^~~~~~~~~~~~~
      |                               static_cast<int>( )

see also #826