[gnome-software] trivial: Fix a compiler warning

[Kalev Lember <klember src gnome org>]

commit af9f4589f4b9de63ba2b9a7bd6cf04f54dc16055
Author: Kalev Lember <klember redhat com>
Date:   Wed Oct 14 16:00:49 2015 +0200

    trivial: Fix a compiler warning

 src/plugins/gs-moduleset.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/plugins/gs-moduleset.c b/src/plugins/gs-moduleset.c
index 1744a18..69cce0c 100644
--- a/src/plugins/gs-moduleset.c
+++ b/src/plugins/gs-moduleset.c
@@ -169,7 +169,7 @@ gs_moduleset_get_n_featured (GsModuleset *moduleset,
        guint i;
        guint cnt;
 
-       g_return_val_if_fail (GS_IS_MODULESET (moduleset), NULL);
+       g_return_val_if_fail (GS_IS_MODULESET (moduleset), 0);
 
        cnt = 0;
        for (i = 0; i < priv->array->len; i++) {