(svn r15765) [0.7] -Backport from trunk:

- Change: [NewGRF] Expose GRF ID of engines in var action property 0x25 (r15739)
- Fix: Add Engine::GetDisplayDefaultCapacity() and use it everywhere, so CB 36 is also used everywhere (r15763)
- Fix: [Windows] Inlined UTF-8 characters (in the source code) are not handled properly on Eastern versions of Windows so escape them (r15762)
- Fix: [Windows] On some system searching a font using its English name fails. So now we search the font using the localised name and use the English name for the final 'validation' only (r15757)

src/newgrf_engine.cpp

@@ -122,7 +122,8 @@ const GRFFile *GetEngineGRF(EngineID engine)
  */
 uint32 GetEngineGRFID(EngineID engine)
 {
-	return GetEngineGRF(engine)->grfid;
+	const GRFFile *file = GetEngineGRF(engine);
+	return file == NULL ? 0 : file->grfid;
 }
 
 
@@ -500,6 +501,9 @@ static uint32 VehicleGetVariable(const ResolverObject *object, byte variable, by
 
 	/* Calculated vehicle parameters */
 	switch (variable) {
+		case 0x25: // Get engine GRF ID
+			return GetEngineGRFID(v->engine_type);
+
 		case 0x40: // Get length of consist
 			if (!HasBit(v->cache_valid, 0)) {
 				v->cached_var40 = PositionHelper(v, false);