hedgewars-engine (rust): fix "protocol_version" -> "hedgewars_engine_protocol_version"
That function/symbol was renamed in ef2fc0210362
#!/bin/sh -
echo "*** Luacheck of Lua locale files:"
luacheck ../share/hedgewars/Data/Locale/*.lua --globals locale --no-max-line-length -q
echo "Missing translations in Lua locale files:"
grep -c -- "^--" ../share/hedgewars/Data/Locale/*.lua