Refactoring define new type for id value.

--HG--
branch : develop

src/libs/ifc/ifcdef.h

@@ -33,6 +33,7 @@
 #include <QStringList>
 #include <QtGlobal>
 
+#include "../vmisc/typedef.h"
 #include "../vmisc/def.h"
 #include "../vmisc/diagnostic.h"
 
@@ -44,11 +45,6 @@ extern const QString CustomIncrSign;
     #include <windows.h>
 #endif /*Q_OS_WIN32*/
 
-static const quint32 null_id = 0;
-
-#define NULL_ID null_id//use this value for initialization variables that keeps id values. 0 mean uknown id value.
-#define NULL_ID_STR QChar('0')
-
 // Detect whether the compiler supports C++11 noexcept exception specifications.
 #  if   defined(__clang__)
 #    if __has_feature(cxx_noexcept)

src/libs/vlayout/vlayoutdef.h

@@ -31,6 +31,8 @@
 
 #include <ciso646>
 
+#include "../vmisc/typedef.h"
+
 enum class LayoutErrors : char
 {
     NoError,

src/libs/vmisc/typedef.h

@@ -0,0 +1,40 @@
+/************************************************************************
+ **
+ **  @file   typedef.h
+ **  @author Roman Telezhynskyi <dismine(at)gmail.com>
+ **  @date   1 3, 2019
+ **
+ **  @brief
+ **  @copyright
+ **  This source code is part of the Valentina project, a pattern making
+ **  program, whose allow create and modeling patterns of clothing.
+ **  Copyright (C) 2019 Valentina project
+ **  <https://bitbucket.org/dismine/valentina> All Rights Reserved.
+ **
+ **  Valentina is free software: you can redistribute it and/or modify
+ **  it under the terms of the GNU General Public License as published by
+ **  the Free Software Foundation, either version 3 of the License, or
+ **  (at your option) any later version.
+ **
+ **  Valentina is distributed in the hope that it will be useful,
+ **  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ **  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ **  GNU General Public License for more details.
+ **
+ **  You should have received a copy of the GNU General Public License
+ **  along with Valentina.  If not, see <http://www.gnu.org/licenses/>.
+ **
+ *************************************************************************/
+#ifndef TYPEDEF_H
+#define TYPEDEF_H
+
+#include <QtGlobal>
+
+using vidtype = quint32;
+
+static const vidtype null_id = 0;
+
+#define NULL_ID null_id//use this value for initialization variables that keeps id values. 0 mean uknown id value.
+#define NULL_ID_STR QChar('0')
+
+#endif // TYPEDEF_H

src/libs/vmisc/vmisc.pri

@@ -42,7 +42,8 @@ HEADERS += \
     $$PWD/literals.h \
     $$PWD/qt_dispatch/qt_dispatch.h \
     $$PWD/vdatastreamenum.h \
-    $$PWD/vmodifierkey.h
+    $$PWD/vmodifierkey.h \
+    $$PWD/typedef.h
 
 # Qt's versions
 # 5.2.0, 5.2.1