[gnome-builder] diagnostic: make fatal highest priority when sorting

[Christian Hergert <chergert src gnome org>]

commit 3530926ec9e04156b29ac83877b18afb91534c5d
Author: Christian Hergert <chergert redhat com>
Date:   Sat Oct 15 17:39:54 2016 -0700

    diagnostic: make fatal highest priority when sorting

 libide/diagnostics/ide-diagnostic.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/libide/diagnostics/ide-diagnostic.c b/libide/diagnostics/ide-diagnostic.c
index 8be7f71..015b26c 100644
--- a/libide/diagnostics/ide-diagnostic.c
+++ b/libide/diagnostics/ide-diagnostic.c
@@ -332,7 +332,8 @@ ide_diagnostic_compare (const IdeDiagnostic *a,
   g_assert (a != NULL);
   g_assert (b != NULL);
 
-  if (0 != (ret = (gint)a->severity - (gint)b->severity))
+  /* Severity is 0..N where N is more important. So reverse comparator. */
+  if (0 != (ret = (gint)b->severity - (gint)a->severity))
     return ret;
 
   if (a->location && b->location)