Show unit portraits in battle HUD

tools/validate_data.ps1

@@ -430,6 +430,9 @@ function Check-Deployment($Deployment, [string]$ScenarioId, [int]$Width, [int]$H
     if (-not [string]::IsNullOrWhiteSpace($officerId) -and (-not $officerIds.Contains($officerId))) {
         Fail "Scenario $ScenarioId deployment $unitId references unknown officer: $officerId"
     }
+    if (Has-Prop $Deployment "portrait") {
+        Check-Portrait-Path (Get-Prop $Deployment "portrait" "") "Scenario $ScenarioId deployment $unitId portrait"
+    }
     if (Has-Prop $Deployment "requires_joined") {
         if (-not ((Get-Prop $Deployment "requires_joined" $false) -is [bool])) {
             Fail "Scenario $ScenarioId deployment $unitId requires_joined must be boolean."