fix: chain building_impl base call in senet house on_place_checks

[dalerank]

@
building_senet_house::on_place_checks() built its own placement warnings without ever calling the base building_impl::on_place_checks(). As a result it silently skipped the standard #needs_road_access / #city_needs_more_workers warnings and the JS on_place_checks event dispatch that every other building gets through the base implementation.

Fix: call building_impl::on_place_checks() as the first statement, matching the established pattern used by the other building types (same fix as #585 mortuary and #586 scribal school).

No behaviour change beyond restoring the missing base warnings/event; builds cleanly (win-msvc-relwithdebinfo-vs2022).
@

[github-actions]

Code formatting issues found

Please format the code locally (see instructions in CONTRIBUTING.md) to fix these issues.

diff --git a/src/window/editor/requests.cpp b/src/window/editor/requests.cpp
index 7e7ec49bc..5ca88fa46 100644
--- a/src/window/editor/requests.cpp
+++ b/src/window/editor/requests.cpp
@@ -65,7 +65,7 @@ static void draw_foreground(int) {
         scenario_editor_request_get(i, &request);
         if (request.resource) {
             text_draw_number(request.year, '+', " ", x + 20, y + 6, FONT_NORMAL_BLACK_ON_LIGHT);
-            lang_text_draw_year(g_scenario.start_year + request.year, x + 80, + 6, FONT_NORMAL_BLACK_ON_LIGHT);
+            lang_text_draw_year(g_scenario.start_year + request.year, x + 80, +6, FONT_NORMAL_BLACK_ON_LIGHT);
             int width = text_draw_number(request.amount, '@', " ", x + 180, y + 6, FONT_NORMAL_BLACK_ON_LIGHT);
             int offset = request.resource + resource_image_offset(request.resource, RESOURCE_IMAGE_ICON);
             ctx.img_generic(image_id_from_group(GROUP_EDITOR_RESOURCE_ICONS) + offset, vec2i{x + 190 + width, y + 3});