Code review comment for lp:~widelands-dev/widelands/font_size-lua

I get 2 compile warnings:

src/graphic/text/rt_render.cc:63:6: warning: no previous prototype for function 'replace_entities' [-Wmissing-prototypes]
void replace_entities(std::string* text) {

src/wui/building_statistics_menu.cc:41:15: warning: unused variable 'kTabHeight' [-Wunused-const-variable]
constexpr int kTabHeight = 35 + 5 * (kBuildGridCellHeight + kLabelHeight + kLabelHeight);