hedgewars-engine (rust): fix "protocol_version" -> "hedgewars_engine_protocol_version"
That function/symbol was renamed in ef2fc0210362
if(WIN32 AND NOT UNIX)
install(DIRECTORY .
DESTINATION ${target_library_install_dir}
FILES_MATCHING PATTERN "*.dll" PATTERN "*.ico"
)
endif(WIN32 AND NOT UNIX)