Fix build.

src/app/tape/tmainwindow.cpp

@@ -3437,7 +3437,7 @@ void TMainWindow::UpdateWindowTitle()
     static QIcon fileIcon = QIcon(QCoreApplication::applicationDirPath() +
                                   QLatin1String("/../Resources/measurements.icns"));
     QIcon icon;
-    if (not curFile.isEmpty())
+    if (not m_curFile.isEmpty())
     {
         if (not isWindowModified())
         {

src/app/valentina/core/vapplication.cpp

@@ -53,6 +53,12 @@
 #include <QIcon>
 #include <Qt>
 
+#if QT_VERSION < QT_VERSION_CHECK(5, 12, 0)
+#include "../vmisc/backport/qscopeguard.h"
+#else
+#include <QScopeGuard>
+#endif
+
 QT_WARNING_PUSH
 QT_WARNING_DISABLE_CLANG("-Wmissing-prototypes")
 QT_WARNING_DISABLE_INTEL(1418)