(svn r3077) static, const, bracing, indentation, 0 -> '\0'/NULL, typos in comments, excess empty lines, minor other changes

nothing spectacular, just some stuff, which piled up

engine.c

@@ -632,7 +632,8 @@ int GetCustomEngineSprite(EngineID engine, const Vehicle *v, byte direction)
  * @param v The wagon to check
  * @return true if it is using an override, false otherwise
  */
-bool UsesWagonOverride(const Vehicle *v) {
+bool UsesWagonOverride(const Vehicle* v)
+{
 	assert(v->type == VEH_Train);
 	return GetWagonOverrideSpriteSet(v->engine_type, v->u.rail.first_engine) != NULL;
 }