[libdazzle/libdazzle-3-28] graph-model: fix spelling

[Christian Hergert <chergert src gnome org>]

commit cae32aca3ca5fce9836e535aede13d1b433355d6
Author: Christian Hergert <chergert redhat com>
Date:   Tue Aug 21 12:53:11 2018 -0700

    graph-model: fix spelling

 src/graphing/dzl-graph-model.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/graphing/dzl-graph-model.c b/src/graphing/dzl-graph-model.c
index e48de4d..d16b412 100644
--- a/src/graphing/dzl-graph-model.c
+++ b/src/graphing/dzl-graph-model.c
@@ -371,7 +371,7 @@ dzl_graph_view_model_iter_set (DzlGraphModelIter *iter,
     }
 
   if (column_id != -1)
-    g_critical ("Invalid column sentinal: %d", column_id);
+    g_critical ("Invalid column sentinel: %d", column_id);
 
 cleanup:
   va_end (args);
@@ -413,7 +413,7 @@ dzl_graph_view_model_iter_get (DzlGraphModelIter *iter,
     }
 
   if (column_id != -1)
-    g_critical ("Invalid column sentinal: %d", column_id);
+    g_critical ("Invalid column sentinel: %d", column_id);
 
 cleanup:
   va_end (args);