Introduce QInt

QInt is a high-level data type that can be used to represent integers,
internally it stores an int64_t value.

The following functions are available:

- qint_from_int() Create a new QInt
- qint_get_int()  Get the stored integer

Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

qint.h

@@ -0,0 +1,16 @@
+#ifndef QINT_H
+#define QINT_H
+
+#include <stdint.h>
+#include "qobject.h"
+
+typedef struct QInt {
+    QObject_HEAD;
+    int64_t value;
+} QInt;
+
+QInt *qint_from_int(int64_t value);
+int64_t qint_get_int(const QInt *qi);
+QInt *qobject_to_qint(const QObject *obj);
+
+#endif /* QINT_H */