Assign a default value to ClickDamageModifier (#19871)

Content.Shared/Weapons/Melee/MeleeWeaponComponent.cs

@@ -75,7 +75,7 @@ public sealed partial class MeleeWeaponComponent : Component
     /// Multiplies damage by this amount for single-target attacks.
     /// </summary>
     [ViewVariables(VVAccess.ReadWrite), DataField("clickDamageModifier")]
-    public FixedPoint2 ClickDamageModifier;
+    public FixedPoint2 ClickDamageModifier = FixedPoint2.New(1);
 
     // TODO: Temporarily 1.5 until interactionoutline is adjusted to use melee, then probably drop to 1.2
     /// <summary>