Enemies are invisible when build is configured with LTO

[Kangie]

Enemies in Marathon / Infinity (presumably Durandal, didn't check) are not visible when the binary is built with LTO.

To Reproduce

CFLAGS="-march=native -O2 -pipe -flto" CXXFLAGS="-march=native -O2 -pipe -flto" ./configure --prefix=/usr --build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu --mandir=/usr/share/man --infodir=/usr/share/info --datadir=/usr/share --sysconfdir=/etc --localstatedir=/var/lib --datarootdir=/usr/share --disable-dependency-tracking --disable-silent-rules --docdir=/usr/share/doc/alephone-99999999 --htmldir=/usr/share/doc/alephone-99999999/html --libdir=/usr/lib64 --enable-opengl --with-ffmpeg --with-png --with-sdl_image --with-zzip --with-curl --without-miniupnpc   

[Kangie]

Note: Building with ubsan -fsanitize=undefined seems to suppress this issue. Whee!