Fix fake event queue process event.

The result of remove_if was fed into erase without checking something
was actually removed.

UNITTESTS/fakes/events/EventQueue.cpp

@@ -98,8 +98,7 @@ void EventQueue::process_events() {
         }
 
         /* dispatch all handlers that happen at this time */
-        _handlers.erase(
-            std::remove_if(
+        auto found = std::remove_if(
             _handlers.begin(),
             _handlers.end(),
             [earliest_tick](internal_event& element) -> bool {
@@ -110,9 +109,11 @@ void EventQueue::process_events() {
                     return false;
                 }
             }
-            ),
-            _handlers.end()
         );
+
+        if (found != _handlers.end()) {
+            _handlers.erase(found, _handlers.end());
+        }
     }
 }