Give visual feedback that loam is used (#1889).

planet/Objects.ocd/Items.ocd/Resources.ocd/Loam.ocd/Script.c

@@ -63,6 +63,8 @@ func FxIntBridgeStart(object clonk, effect fx, int temp, int x, int y)
 		R = 200, G = 150, B = 50,
 		Size = PV_KeyFrames(0, 0, 1, 100, 3, 1000, 2),
 	};
+	// Let the player know the clonk is about to do stuff
+	clonk->PlayAnimation("Dig", CLONK_ANIM_SLOT_Movement, Anim_Linear(0,0, clonk->GetAnimationLength("Dig"), 35, ANIM_Loop), Anim_Const(1000));
 	return FX_OK;
 }