Index: widelands/src/events/event_factory.cc
===================================================================
--- widelands.orig/src/events/event_factory.cc
+++ widelands/src/events/event_factory.cc
@@ -147,6 +147,7 @@ Event & create
 	case 12: return *new Event_Unhide_Area     (name, state);
 	default:
 		assert(false);
+		return *new Event_Allow_Building  (name, state);
 	}
 }
 
@@ -184,6 +185,7 @@ Event & create(Section & s, Editor_Game_
 	case 12: return *new Event_Unhide_Area     (s, egbase);
 	default:
 		assert(false);
+		return *new Event_Allow_Building  (s, egbase);
 	}
 }
 
Index: widelands/src/map.h
===================================================================
--- widelands.orig/src/map.h
+++ widelands/src/map.h
@@ -1062,6 +1062,7 @@ throw ()
 	case Map_Object::WALK_W:  return  l_n(f);
 	default:
 		assert(false);
+		return tl_n(f);
 	}
 }
 
Index: widelands/src/trigger/trigger_factory.cc
===================================================================
--- widelands.orig/src/trigger/trigger_factory.cc
+++ widelands/src/trigger/trigger_factory.cc
@@ -99,6 +99,7 @@ Trigger & create(size_t const id, char c
 	case 5: return *new Trigger_Vision            (name, set);
 	default:
 		assert(false);
+		return *new Trigger_Building          (name, set);
 	}
 }