Index: src/rail_cmd.cpp
===================================================================
--- src/rail_cmd.cpp	(revision 27688)
+++ src/rail_cmd.cpp	(working copy)
@@ -68,7 +68,9 @@
 
 	uint i = 0;
 	for (; i < lengthof(_original_railtypes); i++) _railtypes[i] = _original_railtypes[i];
-	for (; i < lengthof(_railtypes);          i++) _railtypes[i] = RailtypeInfo(); // zero-init
+
+	static RailtypeInfo empty_railtype;
+	for (; i < lengthof(_railtypes);          i++) _railtypes[i] = empty_railtype;
 }
 
 void ResolveRailTypeGUISprites(RailtypeInfo *rti)