conflict with the major() macro from sys/types.h

Index: Pdf4QtLibCore/sources/pdfdocument.cpp
--- Pdf4QtLibCore/sources/pdfdocument.cpp.orig
+++ Pdf4QtLibCore/sources/pdfdocument.cpp
@@ -98,7 +98,7 @@ QByteArray PDFDocument::getVersion() const
 
     if (result.isEmpty() && m_info.version.isValid())
     {
-        result = QString("%1.%2").arg(m_info.version.major).arg(m_info.version.minor).toLatin1();
+        result = QString("%1.%2").arg(m_info.version.vmajor).arg(m_info.version.vminor).toLatin1();
     }
 
     return result;
