Fixes JOB_STARTED event

docs/changelog.txt

@@ -42,6 +42,7 @@ changelog.txt uses a syntax similar to RST, with a few special sequences:
 - `tiletypes`: no longer resets dig priority to the default when updating other properties of a tile
 - `automaterial`: fix rendering errors with box boundary markers
 - Core: fix the segmentation fault with the REPORT event in EventManager
+- Core: fix the new JOB_STARTED event only sending each event once, to the first handler listed
 
 ## Misc Improvements
 - `blueprint`: new ``--smooth`` option for recording all smoothed floors and walls instead of just the ones that require smoothing for later carving

library/modules/EventManager.cpp

@@ -444,12 +444,14 @@ static void manageJobStartedEvent(color_ostream& out) {
 
     // iterate event handler callbacks
     multimap<Plugin*, EventHandler> copy(handlers[EventType::JOB_STARTED].begin(), handlers[EventType::JOB_STARTED].end());
-    for (auto &key_value : copy) {
+    for (df::job_list_link* link = df::global::world->jobs.list.next; link != nullptr; link = link->next) {
-        auto &handler = key_value.second;
+        df::job* job = link->item;
-        for (df::job_list_link* link = df::global::world->jobs.list.next; link != nullptr; link = link->next) {
+        bool send = false;
-            df::job* job = link->item;
+        for (auto &key_value : copy) {
+            auto &handler = key_value.second;
             // the jobs must have a worker to start
-            if (job && Job::getWorker(job) && !startedJobs.count(job->id)) {
+            if (send || (job && Job::getWorker(job) && !startedJobs.count(job->id))) {
+                send = true;
                 startedJobs.emplace(job->id);
                 handler.eventHandler(out, job);
             }