Fixed generation regression leading to unnecessary access specifiers in some cases.

This was introduced in PR151 (Field properties).

src/Generator/Generators/CLI/CLIHeadersTemplate.cs

@@ -270,9 +270,14 @@ namespace CppSharp.Generators.CLI
 
             if (@class.Fields.Any())
             {
+                PushBlock(CLIBlockKind.AccessSpecifier);
                 NewLine();
                 WriteLine("private:");
+                PopBlock(NewLineKind.IfNotEmpty);
+
+                PushBlock(CLIBlockKind.Fields);
                 GenerateClassFields(@class);
+                PopBlock();
             }
 
             WriteLine("};");

src/Generator/Generators/CLI/CLITextTemplate.cs

@@ -45,6 +45,8 @@ namespace CppSharp.Generators.CLI
         public const int Template = BlockKind.LAST + 16;
         public static int Destructor = BlockKind.LAST + 17;
         public static int Finalizer = BlockKind.LAST + 18;
+        public static int AccessSpecifier = BlockKind.LAST + 19;
+        public static int Fields = BlockKind.LAST + 20;
     }
 
     /// <summary>