[sysprof] line-visualizer: lower task priority

[Christian Hergert <chergert src gnome org>]

commit a71f05b88502c2e6f8d101a7f747c00125a6ba65
Author: Christian Hergert <chergert redhat com>
Date:   Thu Sep 28 13:25:22 2017 -0700

    line-visualizer: lower task priority
    
    Keep task priorities lower than the Gtk main loop.

 lib/sp-line-visualizer-row.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/lib/sp-line-visualizer-row.c b/lib/sp-line-visualizer-row.c
index 5340f61..b8e205b 100644
--- a/lib/sp-line-visualizer-row.c
+++ b/lib/sp-line-visualizer-row.c
@@ -640,6 +640,7 @@ sp_line_visualizer_row_load_data_async (SpLineVisualizerRow *self,
   g_assert (!cancellable || G_IS_CANCELLABLE (cancellable));
 
   task = g_task_new (self, cancellable, callback, user_data);
+  g_task_set_priority (task, G_PRIORITY_LOW);
   g_task_set_source_tag (task, sp_line_visualizer_row_load_data_async);
 
   if (priv->reader == NULL)