Core: Utils: Fix compile with Qt4

Change-Id: Ibe4b504b84e467b1450b63bbbc7b569558fd8733
Reviewed-by: hjk <hjk121@nokiamail.com>

src/libs/utils/algorithm.h

@@ -32,7 +32,17 @@
 
 #include <algorithm>
 
-#include <qcompilerdetection.h> // for Q_REQUIRE_RESULT
+#if QT_VERSION < 0x050000
+    #ifndef Q_REQUIRED_RESULT
+    # if defined(Q_CC_GNU)
+    #   define Q_REQUIRED_RESULT __attribute__ ((warn_unused_result))
+    # else
+    #   define Q_REQUIRED_RESULT
+    # endif
+    #endif
+#else
+    #include <qcompilerdetection.h> // for Q_REQUIRED_RESULT
+#endif
 
 namespace Utils
 {

src/plugins/coreplugin/editormanager/openeditorswindow.cpp

@@ -158,7 +158,11 @@ void OpenEditorsWindow::selectPreviousEditor()
 QSize OpenEditorsTreeWidget::sizeHint() const
 {
     return QSize(sizeHintForColumn(0) + verticalScrollBar()->width() + frameWidth() * 2,
+#if QT_VERSION < 0x050200
+                 minimumHeight());
+#else
                  viewportSizeHint().height() + frameWidth() * 2);
+#endif
 }
 
 QSize OpenEditorsWindow::sizeHint() const