Add missing QMetaType include

src/covermanager/albumcoverloaderresult.h

@@ -24,6 +24,7 @@
 
 #include <QImage>
 #include <QUrl>
+#include <QMetaType>
 
 #include "albumcoverimageresult.h"
 

src/lyrics/lyricssearchrequest.h

@@ -22,6 +22,7 @@
 
 #include <QtGlobal>
 #include <QString>
+#include <QMetaType>
 
 class LyricsSearchRequest {
  public:

src/radios/radiochannel.h

@@ -20,6 +20,7 @@
 #ifndef RADIOCHANNEL_H
 #define RADIOCHANNEL_H
 
+#include <QMetaType>
 #include <QList>
 #include <QString>
 #include <QUrl>

src/radios/radioservice.h

@@ -21,6 +21,7 @@
 #define RADIOSERVICE_H
 
 #include <QObject>
+#include <QMetaType>
 #include <QList>
 #include <QVariant>
 #include <QByteArray>

src/scrobbler/scrobblercacheitem.h

@@ -25,6 +25,7 @@
 #include <memory>
 
 #include <QtGlobal>
+#include <QMetaType>
 
 #include "scrobblemetadata.h"
 

src/smartplaylists/smartplaylistsearchterm.h

@@ -23,6 +23,7 @@
 
 #include "config.h"
 
+#include <QMetaType>
 #include <QList>
 #include <QDataStream>
 #include <QVariant>

src/smartplaylists/smartplaylistsitem.h

@@ -23,6 +23,7 @@
 
 #include "config.h"
 
+#include <QMetaType>
 #include <QByteArray>
 
 #include "core/simpletreeitem.h"