QString: Introduce qstring_append_int()

Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/qstring.c b/qstring.c
index e422bd9..ad17769 100644
--- a/qstring.c
+++ b/qstring.c
@@ -75,6 +75,14 @@
     qstring->string[qstring->length] = 0;
 }
 
+void qstring_append_int(QString *qstring, int64_t value)
+{
+    char num[32];
+
+    snprintf(num, sizeof(num), "%" PRId64, value);
+    qstring_append(qstring, num);
+}
+
 /**
  * qstring_append_chr(): Append a C char to a QString
  */