Decompile 'volatile' modifier.

ICSharpCode.Decompiler/Ast/AstBuilder.cs

@@ -641,6 +641,10 @@ namespace ICSharpCode.Decompiler.Ast
 					modifiers |= Modifiers.Readonly;
 			}
 			
+			RequiredModifierType modreq = fieldDef.FieldType as RequiredModifierType;
+			if (modreq != null && modreq.ModifierType.FullName == typeof(IsVolatile).FullName)
+				modifiers |= Modifiers.Volatile;
+			
 			return modifiers;
 		}
 		

ICSharpCode.Decompiler/Tests/ValueTypes.cs

@@ -52,6 +52,7 @@ public static class ValueTypes
 	
 	private static readonly ValueTypes.S ReadOnlyS = default(ValueTypes.S);
 	private static ValueTypes.S MutableS = default(ValueTypes.S);
+	private static volatile int VolatileInt;
 	
 	public static void CallMethodViaField()
 	{