Fix CA1825 warnings on empty array initialisation.

OpenRA.Mods.Common/Traits/Buildings/BridgeHut.cs

@@ -9,6 +9,7 @@
  */
 #endregion
 
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using OpenRA.Effects;
@@ -24,7 +25,7 @@ namespace OpenRA.Mods.Common.Traits
 		public readonly string[] Types = { "GroundLevelBridge" };
 
 		[Desc("Offsets to look for adjacent bridges to act on")]
-		public readonly CVec[] NeighbourOffsets = { };
+		public readonly CVec[] NeighbourOffsets = Array.Empty<CVec>();
 
 		[Desc("Delay between each segment repair step")]
 		public readonly int RepairPropagationDelay = 20;

OpenRA.Mods.Common/Traits/Buildings/BridgePlaceholder.cs

@@ -9,6 +9,7 @@
  */
 #endregion
 
+using System;
 using OpenRA.Primitives;
 using OpenRA.Traits;
 
@@ -25,7 +26,7 @@ namespace OpenRA.Mods.Common.Traits
 		[Desc("Actor type to replace with on repair.")]
 		public readonly string ReplaceWithActor = null;
 
-		public readonly CVec[] NeighbourOffsets = { };
+		public readonly CVec[] NeighbourOffsets = Array.Empty<CVec>();
 
 		public override object Create(ActorInitializer init) { return new BridgePlaceholder(init.Self, this); }
 	}

OpenRA.Mods.Common/Traits/Buildings/Building.cs

@@ -56,9 +56,9 @@ namespace OpenRA.Mods.Common.Traits
 		[Desc("Clear smudges from underneath the building footprint on transform.")]
 		public readonly bool RemoveSmudgesOnTransform = true;
 
-		public readonly string[] BuildSounds = { };
+		public readonly string[] BuildSounds = Array.Empty<string>();
 
-		public readonly string[] UndeploySounds = { };
+		public readonly string[] UndeploySounds = Array.Empty<string>();
 
 		public override object Create(ActorInitializer init) { return new Building(init, this); }
 

OpenRA.Mods.Common/Traits/Buildings/GroundLevelBridge.cs

@@ -9,6 +9,7 @@
  */
 #endregion
 
+using System;
 using System.Collections.Generic;
 using OpenRA.GameRules;
 using OpenRA.Primitives;
@@ -23,7 +24,7 @@ namespace OpenRA.Mods.Common.Traits
 
 		public readonly string Type = "GroundLevelBridge";
 
-		public readonly CVec[] NeighbourOffsets = { };
+		public readonly CVec[] NeighbourOffsets = Array.Empty<CVec>();
 
 		[WeaponReference]
 		[Desc("The name of the weapon to use when demolishing the bridge")]

OpenRA.Mods.Common/Traits/Buildings/PrimaryBuilding.cs

@@ -9,6 +9,7 @@
  */
 #endregion
 
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using OpenRA.Mods.Common.Orders;
@@ -38,7 +39,7 @@ namespace OpenRA.Mods.Common.Traits
 
 		[Desc("List of production queues for which the primary flag should be set.",
 			"If empty, the list given in the `Produces` property of the `" + nameof(Production) + "` trait will be used.")]
-		public readonly string[] ProductionQueues = { };
+		public readonly string[] ProductionQueues = Array.Empty<string>();
 
 		[CursorReference]
 		[Desc("Cursor to display when setting the primary building.")]

OpenRA.Mods.Common/Traits/Buildings/RallyPoint.cs

@@ -9,6 +9,7 @@
  */
 #endregion
 
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using OpenRA.Mods.Common.Effects;
@@ -42,7 +43,7 @@ namespace OpenRA.Mods.Common.Traits
 		public readonly bool IsPlayerPalette = true;
 
 		[Desc("A list of 0 or more offsets defining the initial rally point path.")]
-		public readonly CVec[] Path = { };
+		public readonly CVec[] Path = Array.Empty<CVec>();
 
 		[NotificationReference("Speech")]
 		[Desc("The speech notification to play when setting a new rallypoint.")]