For building of the 32bit variant of http://build.opensuse.org/package/show/Emulators/wine on Leap 16.5 the following packages are required from the openSUSE:Factory project

mingw32-binutils mingw32-filesystem mingw32-gcc mingw32-gmp mingw32-headers mingw32-mpc mingw32-mpfr mingw32-pkgconf mingw32-runtime mingw32-winpthreads mingw32-zlib