qt: Remove HAS_QT52

We require Qt >= 5.2 when building with Qt5, so HAS_QT5 is equivalent to
HAS_QT52

modules/gui/qt/components/open_panels.cpp

@@ -273,7 +273,7 @@ void FileOpenPanel::updateMRL()
         }
     else
     {
-#if HAS_QT52
+#if HAS_QT5
         QList<QUrl> urls = dialogBox->selectedUrls();
         foreach( const QUrl &url, urls )
             fileList.append( url.toEncoded() );

modules/gui/qt/dialogs_provider.cpp

@@ -119,7 +119,7 @@ QStringList DialogsProvider::getOpenURL( intf_thread_t* p_intf, QWidget *parent,
 {
     QStringList res;
 
-#if HAS_QT52
+#if HAS_QT5
     QList<QUrl> urls = QFileDialog::getOpenFileUrls( parent, caption, QUrl::fromUserInput( dir ), filter, selectedFilter );
 
     foreach( const QUrl& url, urls )
@@ -139,7 +139,7 @@ QString DialogsProvider::getSaveFileName( QWidget *parent,
                                           const QString &filter,
                                           QString *selectedFilter )
 {
-#if HAS_QT52
+#if HAS_QT5
     QUrl url = QFileDialog::getSaveFileUrl( parent, caption, QUrl::fromUserInput( dir ), filter, selectedFilter );
     return QString( url.toEncoded() );
 #else

modules/gui/qt/qt.hpp

@@ -47,7 +47,6 @@
 #endif
 
 #define HAS_QT5  ( QT_VERSION >= 0x050000 )
-#define HAS_QT52 ( QT_VERSION >= 0x050200 )
 #define HAS_QT56 ( QT_VERSION >= 0x050600 )
 
 /* Q_DECL_OVERRIDE is a Qt5 feature, add empty define to not break with Qt4 */