compatibility fixes for QOpenGLWidgets on Qt Version 5.4 and below

common/OFGLWidget.hh

@@ -52,7 +52,7 @@
 
 #include <QtGlobal>
 
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 4, 0))
+#if (QT_VERSION >= QT_VERSION_CHECK(5, 4, 4))
 
 #include <QOpenGLWidget>
 #include <QSurfaceFormat>

widgets/glWidget/QtBaseViewer.cc

@@ -514,7 +514,7 @@ glViewer::copyToImage( QImage& _image,
 
 //    makeCurrent();
 
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 4, 0))
+#if (QT_VERSION >= QT_VERSION_CHECK(5, 4, 4))
   _image = glWidget_->grabFramebuffer()
 #else
   _image = glWidget_->grabFrameBuffer(true)

widgets/glWidget/QtBaseViewer_qt.cc

@@ -65,7 +65,7 @@
 
 #include <OpenFlipper/common/GlobalOptions.hh>
 
-#if (QT_VERSION >= QT_VERSION_CHECK(5,4,0))
+#if (QT_VERSION >= QT_VERSION_CHECK(5,4,4))
   #include <QOpenGLContext>
 #endif
 
@@ -80,7 +80,7 @@
 
 
 void glViewer::swapBuffers() {
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 4, 0))
+#if (QT_VERSION >= QT_VERSION_CHECK(5, 4, 4))
   glWidget_->context()->swapBuffers(glWidget_->context()->surface());
 #else
   glWidget_->swapBuffers();