Fix [campaign] end_credits= having no effect

changelog.md

@@ -64,6 +64,7 @@
    * Fixed ThemeWML `[label] font_rgb=` generating text elements with broken UTF-8 sequences.
    * abilities used like weapon can call a [teaching_anim] instead of [leading_anim] now.
    * The campaign end screen is no longer displayed when `[campaign]/[endlevel] end_credits=` is set to a false value.
+   * Fixed `end_credits=` in `[campaign]` not having any effect.
  ### Miscellaneous and Bug Fixes
    * Added support for 1.14’s tag names in `[terrain_defaults]` (issue #5308).
    * Replaced legacy SDL_ttf/FriBidi-based font rendering used in old GUI1 code paths with Pango.

src/game_initialization/create_engine.cpp

@@ -405,6 +405,7 @@ void create_engine::prepare_for_campaign(const std::string& difficulty)
 
 	state_.classification().end_text = current_level_data["end_text"].str();
 	state_.classification().end_text_duration = current_level_data["end_text_duration"];
+	state_.classification().end_credits = current_level_data["end_credits"].to_bool(true);
 
 	state_.classification().campaign_define = current_level_data["define"].str();
 	state_.classification().campaign_xtra_defines =