Merge pull request #32 from middlingphys/fix_EnableHighDpiScaling_war…

…ning

qt: Set AA_EnableHighDpiScaling attribute early

src/qt/bitcoin.cpp

@@ -562,13 +562,12 @@ int main(int argc, char *argv[])
     Q_INIT_RESOURCE(bitcoin);
     Q_INIT_RESOURCE(bitcoin_locale);
 
-    BitcoinApplication app(argc, argv);
 #if QT_VERSION > 0x050100
     // Generate high-dpi pixmaps
     QApplication::setAttribute(Qt::AA_UseHighDpiPixmaps);
 #endif
 #if QT_VERSION >= 0x050600
-    QGuiApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
+    QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
 #endif
 #ifdef Q_OS_MAC
     QApplication::setAttribute(Qt::AA_DontShowIconsInMenus);
@@ -581,6 +580,8 @@ int main(int argc, char *argv[])
     QSslConfiguration::setDefaultConfiguration(sslconf);
 #endif
 
+    BitcoinApplication app(argc, argv);
+
     // Register meta types used for QMetaObject::invokeMethod
     qRegisterMetaType< bool* >();
     //   Need to pass name here as CAmount is a typedef (see http://qt-project.org/doc/qt-5/qmetatype.html#qRegisterMetaType)