old Qt fix

libs/widgets/qcodeedit.h

@@ -23,6 +23,7 @@
 #include <QPlainTextEdit>
 #include <QTreeWidget>
 #include <QScrollBar>
+#include <QUrl>
 #include "iconedlabel.h"
 #include "qad_widgets_export.h"
 

libs/widgets/qcodeedit_completer_p.cpp

@@ -8,7 +8,9 @@ QCodeEditCompleter::QCodeEditCompleter(QWidget * parent): QTreeWidget(parent) {
 	setColumnCount(2);
 	setRootIsDecorated(false);
 	setHeaderHidden(true);
+#if QT_VERSION >= QT_VERSION_CHECK(5, 2, 0)
 	setSizeAdjustPolicy(QAbstractScrollArea::AdjustToContents);
+#endif
 	setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
 	header()->setDefaultAlignment(Qt::AlignCenter);
 	header()->