qom: Make object_resolve_path_component() path argument const

A usage with a hardcoded partial path such as

  object_resolve_path_component(obj, "foo")

is totally valid but currently leads to a compilation error. Fix this.

Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

include/qom/object.h

diff --git a/include/qom/object.h b/include/qom/object.h
index d43b289..1ef2f0e 100644
--- a/include/qom/object.h
+++ b/include/qom/object.h
@@ -900,7 +900,7 @@
  *
  * Returns: The resolved object or NULL on path lookup failure.
  */
-Object *object_resolve_path_component(Object *parent, gchar *part);
+Object *object_resolve_path_component(Object *parent, const gchar *part);
 
 /**
  * object_property_add_child:

qom/object.c

diff --git a/qom/object.c b/qom/object.c
index 351b88c..03e6f24 100644
--- a/qom/object.c
+++ b/qom/object.c
@@ -1017,7 +1017,7 @@
     return newpath;
 }
 
-Object *object_resolve_path_component(Object *parent, gchar *part)
+Object *object_resolve_path_component(Object *parent, const gchar *part)
 {
     ObjectProperty *prop = object_property_find(parent, part, NULL);
     if (prop == NULL) {