Fix for issue #660 with stated preferred decal. (The more complex example of the two possible.)

Templates/Full/game/art/datablocks/weapons/grenadefx.cs

@@ -893,7 +893,7 @@ datablock ProjectileData(GrenadeLauncherProjectile)
    explosion = GrenadeLauncherExplosion;
    waterExplosion = GrenadeLauncherWaterExplosion;
 
-   decal = ExpBlastDecal;
+   decal = ScorchRXDecal;
    splash = GrenadeSplash;
 
    particleEmitter = GrenadeProjSmokeTrailEmitter;