TDecimal fix

Src/Data/Myc.Data.Value.pas

@@ -5,8 +5,7 @@ interface
 uses
     System.SysUtils,
     Myc.Data.Scalar,
-    Myc.Data.Series,
-    Myc.Data.Decimal;
+    Myc.Data.Series;
 
 type
     TDataValueKind = (vkVoid, vkScalar, vkInterface, vkText, vkSeries, vkRecordSeries, vkRecord, vkMemberSeries, vkGeneric);
@@ -94,7 +93,7 @@ end;
 function TDataValue.AsVal<T>: TVal<T>;
 begin
     if (FKind <> vkGeneric) then
-        raise EInvalidCast.Create('Cannot read value as ' + PTypeInfo(TypeInfo(T)).Name + '.');
+        raise EInvalidCast.Create('Cannot read value as ' + String(PTypeInfo(TypeInfo(T)).Name) + '.');
     Result := TVal<T>(FInterface);
 end;