[gnome-maps] build: Fix "non-void function should return a value"

[Jonas Danielsson <jonasdn src gnome org>]

commit d8a000142619e3a6114f8438577a318f4665e46e
Author: Ting-Wei Lan <lantw src gnome org>
Date:   Mon Feb 9 19:33:25 2015 +0800

    build: Fix "non-void function should return a value"
    
    https://bugzilla.gnome.org/show_bug.cgi?id=744613

 lib/maps-contact-store.c |    2 +-
 lib/maps-contact.c       |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/lib/maps-contact-store.c b/lib/maps-contact-store.c
index 2e0b071..9045d12 100644
--- a/lib/maps-contact-store.c
+++ b/lib/maps-contact-store.c
@@ -303,7 +303,7 @@ maps_contact_store_load (MapsContactStore *store)
 GList *
 maps_contact_store_get_contacts (MapsContactStore *store)
 {
-  g_return_if_fail (MAPS_IS_CONTACT_STORE (store));
+  g_return_val_if_fail (MAPS_IS_CONTACT_STORE (store), NULL);
 
   return store->priv->list;
 }
diff --git a/lib/maps-contact.c b/lib/maps-contact.c
index b681c4b..06ccf8f 100644
--- a/lib/maps-contact.c
+++ b/lib/maps-contact.c
@@ -241,7 +241,7 @@ maps_contact_add_place (MapsContact  *contact,
 GList *
 maps_contact_get_places (MapsContact *contact)
 {
-  g_return_if_fail (MAPS_IS_CONTACT (contact));
+  g_return_val_if_fail (MAPS_IS_CONTACT (contact), NULL);
 
   return contact->priv->places;
 }