(svn r8838) -Feature: Show newgrf error messages loaded in Action B in the newgrf gui

window. GRFs with an error have a warning symbol shown before the name.

src/gfxinit.cpp

@@ -333,6 +333,7 @@ static const SpriteID _openttd_grf_indexes[] = {
 	377, 377, // <20> small
 	153, 153, // <20> medium
 	601, 601, // <20> large
+	SPR_WARNING_SIGN, SPR_WARNING_SIGN,
 	END
 };