some more fixes

Author: inforithmics

nuget/Sqlite_net.SourceGenerator/SQLiteFastColumnSetterGenerator.cs

@@ -133,7 +133,7 @@ static bool HasBaseClass (ClassDeclarationSyntax classDecl)
 				    // Include property if not ignored
 				    if (!ignore) {
 					    var columnName = GetColumnName (member);
-					    properties.Add (new PropertyInfo (member.Name, member.Type.ToDisplayString (), columnName, member.Type.TypeKind == TypeKind.Enum));
+					    properties.Add (new PropertyInfo (member.Name, member.Type.ToDisplayString (), columnName, IsEnum(member)));
 				    }
 			    }
 		    }
@@ -167,6 +167,22 @@ static bool HasBaseClass (ClassDeclarationSyntax classDecl)
 		    properties);
 	}
 
+    private static bool IsEnum (IPropertySymbol member)
+	{
+
+		var type = member.Type;
+		if (type is INamedTypeSymbol named &&
+		    named.OriginalDefinition.SpecialType == SpecialType.System_Nullable_T) {
+			type = named.TypeArguments[0];
+		}
+
+		if (type.TypeKind == TypeKind.Enum) {
+			return true;
+		}
+
+		return false;
+	}
+
     private static bool HasSQLiteAttribute (INamedTypeSymbol? classSymbol)
     {
 	    if (classSymbol != null && cachedHasSqliteAttribute.TryGetValue(classSymbol, out var result)) {