[gedit-code-assistance] Fix crash in gca_diagnostic_message_reposition

[Elad Alfassa <eladalfassa src gnome org>]

commit 1459da0dbba48b7ae395dfb7e6213061a0b2c5ff
Author: Elad Alfassa <elad fedoraproject org>
Date:   Fri Sep 5 15:41:56 2014 +0300

    Fix crash in gca_diagnostic_message_reposition
    
    gtk_event_box_get_preferred_width expects to get a pointer to an int,
    giving it null instead causes a segfault.
    
    Also, rename variable name to match the way they are named in gtk.

 src/gca-diagnostic-message.vala |    7 ++++---
 1 files changed, 4 insertions(+), 3 deletions(-)
---
diff --git a/src/gca-diagnostic-message.vala b/src/gca-diagnostic-message.vala
index 15aaefb..82a4bf0 100644
--- a/src/gca-diagnostic-message.vala
+++ b/src/gca-diagnostic-message.vala
@@ -347,12 +347,13 @@ class DiagnosticMessage : EventBox
                        d_view.add_child_in_window(this, TextWindowType.TEXT, 0, 0);
                }
 
+               int natwidth;
                int minwidth;
-               base.get_preferred_width(null, out minwidth);
+               base.get_preferred_width(out minwidth, out natwidth);
 
-               if (minwidth < width)
+               if (natwidth < width)
                {
-                       width = minwidth;
+                       width = natwidth;
                }
 
                int natural_height;