add logging to sawyerstreamreader, which now gives a bit more info in the logs

Author: LeftofZen

AvaGui/Models/ObjectEditorModel.cs

@@ -221,7 +221,7 @@ void CreateIndex(string[] allFiles, IProgress<float>? progress)
 
 		private bool LoadSingleObjectFile(string file, IDictionary<string, IndexObjectHeader> ccHeaderIndex, IDictionary<string, UiLocoFile> ccObjectCache, out DatFileInfo? fileInfo)
 		{
-			(fileInfo, var locoObject) = SawyerStreamReader.LoadFullObjectFromFile(file);
+			(fileInfo, var locoObject) = SawyerStreamReader.LoadFullObjectFromFile(file, logger: Logger);
 
 			if (locoObject == null)
 			{

Core/DatFileParsing/SawyerStreamReader.cs

@@ -161,11 +161,26 @@ public static (DatFileInfo DatFileInfo, ILocoObject? LocoObject) LoadFullObjectF
 
 		static void ValidateLocoStruct(S5Header s5Header, ILocoStruct locoStruct, ILogger? logger)
 		{
+			var warnings = new List<string>();
+
 			try
 			{
+				if (s5Header.SourceGame == SourceGame.Vanilla && !OriginalObjectFiles.Names.ContainsKey(s5Header.Name.Trim()))
+				{
+					warnings.Add($"\"{s5Header.Name}\" is not a vanilla object but is marked as such.");
+				}
+
 				if (!locoStruct.Validate())
 				{
-					logger?.Warning($"\"{s5Header.Name}\" failed validation");
+					warnings.Add($"\"{s5Header.Name}\" failed validation");
+				}
+
+				if (warnings.Count != 0)
+				{
+					foreach (var warning in warnings)
+					{
+						logger?.Warning(warning);
+					}
 				}
 				else
 				{