[gnome-builder/wip/chergert/debugger: 82/89] mi2: check for NULL return values

[Christian Hergert <chergert src gnome org>]

commit ed01aa3533ea15ca2996bfdb4e1d0620e71fdc48
Author: Christian Hergert <chergert redhat com>
Date:   Sat Apr 8 19:37:23 2017 -0700

    mi2: check for NULL return values

 contrib/mi2/mi2-console-message.c |   12 +++++++++---
 1 files changed, 9 insertions(+), 3 deletions(-)
---
diff --git a/contrib/mi2/mi2-console-message.c b/contrib/mi2/mi2-console-message.c
index 9e84fc7..71dc3bf 100644
--- a/contrib/mi2/mi2-console-message.c
+++ b/contrib/mi2/mi2-console-message.c
@@ -44,14 +44,20 @@ mi2_console_message_serialize (Mi2Message *message)
 {
   Mi2ConsoleMessage *self = (Mi2ConsoleMessage *)message;
   g_autofree gchar *escaped = NULL;
-  g_autofree gchar *str = NULL;
 
   g_assert (MI2_IS_CONSOLE_MESSAGE (message));
 
   escaped = g_strescape (self->message ? self->message : "", "");
-  str = g_strdup_printf ("~\"%s\"\n", escaped);
 
-  return g_bytes_new_take (g_steal_pointer (&str), strlen (str));
+  if (escaped != NULL)
+    {
+      g_autofree gchar *str = g_strdup_printf ("~\"%s\"\n", escaped);
+
+      if (str != NULL)
+        return g_bytes_new_take (g_steal_pointer (&str), strlen (str));
+    }
+
+  return NULL;
 }
 
 static void