Replace use of deprecated C++ headers

src/device/afcfile.h

@@ -3,7 +3,7 @@
 
 #include "config.h"
 
-#include <stdint.h>
+#include <cstdint>
 #include <libimobiledevice/afc.h>
 
 #include <QtGlobal>

src/device/cddasongloader.cpp

@@ -20,7 +20,7 @@
 
 #include "config.h"
 
-#include <stddef.h>
+#include <cstddef>
 #include <glib.h>
 #include <glib/gtypes.h>
 #include <glib-object.h>

src/device/devicedatabasebackend.cpp

@@ -20,7 +20,7 @@
 
 #include "config.h"
 
-#include <assert.h>
+#include <cassert>
 
 #include <QObject>
 #include <QThread>

src/device/filesystemdevice.cpp

@@ -20,7 +20,7 @@
 
 #include "config.h"
 
-#include <assert.h>
+#include <cassert>
 
 #include <QThread>
 #include <QString>

src/device/mtpconnection.cpp

@@ -21,8 +21,8 @@
 
 #include "config.h"
 
-#include <stdlib.h>
-#include <stdint.h>
+#include <cstdlib>
+#include <cstdint>
 
 #include <QList>
 #include <QByteArray>

src/device/mtpdevice.cpp

@@ -22,8 +22,8 @@
 #include "config.h"
 
 #include <libmtp.h>
-#include <stdint.h>
-#include <stdlib.h>
+#include <cstdint>
+#include <cstdlib>
 
 #include <QThread>
 #include <QMutex>