[gtksourceview: 2/2] build: fix CI warning/error

[Christian Hergert <chergert src gnome org>]

commit 9e7d80c4099120a47707299aafe7d59400cb3daa
Author: Christian Hergert <chergert redhat com>
Date:   Sun Jul 24 13:49:29 2022 -0700

    build: fix CI warning/error

 .../completion-providers/snippets/gtksourcecompletionsnippets.c        | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)
---
diff --git a/gtksourceview/completion-providers/snippets/gtksourcecompletionsnippets.c 
b/gtksourceview/completion-providers/snippets/gtksourcecompletionsnippets.c
index afa36c71..626ea33a 100644
--- a/gtksourceview/completion-providers/snippets/gtksourcecompletionsnippets.c
+++ b/gtksourceview/completion-providers/snippets/gtksourcecompletionsnippets.c
@@ -283,11 +283,10 @@ gtk_source_completion_snippets_activate (GtkSourceCompletionProvider *provider,
                                          GtkSourceCompletionContext  *context,
                                          GtkSourceCompletionProposal *proposal)
 {
-       GtkSourceCompletionSnippets *self = (GtkSourceCompletionSnippets *)provider;
        GtkSourceCompletionSnippetsProposal *p = (GtkSourceCompletionSnippetsProposal *)proposal;
        GtkTextIter begin, end;
 
-       g_assert (GTK_SOURCE_IS_COMPLETION_SNIPPETS (self));
+       g_assert (GTK_SOURCE_IS_COMPLETION_SNIPPETS (provider));
        g_assert (GTK_SOURCE_IS_COMPLETION_CONTEXT (context));
        g_assert (GTK_SOURCE_IS_COMPLETION_SNIPPETS_PROPOSAL (p));