check voice actor references

OpenRA.Mods.Common/Traits/C4Demolition.cs

@@ -22,16 +22,21 @@ namespace OpenRA.Mods.Common.Traits
 		[Desc("Delay to demolish the target once the C4 is planted." +
 			"Measured in game ticks. Default is 1.8 seconds.")]
 		public readonly int C4Delay = 45;
+
 		[Desc("Number of times to flash the target")]
 		public readonly int Flashes = 3;
+
 		[Desc("Delay before the flashing starts")]
 		public readonly int FlashesDelay = 4;
+
 		[Desc("Interval between each flash")]
 		public readonly int FlashInterval = 4;
+
 		[Desc("Duration of each flash")]
 		public readonly int FlashDuration = 3;
+
 		[Desc("Voice string when planting explosive charges.")]
-		public readonly string Voice = "Attack";
+		[VoiceReference] public readonly string Voice = "Action";
 
 		public object Create(ActorInitializer init) { return new C4Demolition(this); }
 	}