[glib/glib-2-46] Fix g_strerror() on non-glibc

[Dan Winship <danw src gnome org>]

commit feb4fb2842ef123b16b0cdf8d50be192e30862be
Author: Dan Winship <danw gnome org>
Date:   Mon Nov 16 16:57:38 2015 -0500

    Fix g_strerror() on non-glibc
    
    When using one of the codepaths that copies the error string into buf,
    make sure the string gets strdup() afterward.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=758194

 glib/gstrfuncs.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/glib/gstrfuncs.c b/glib/gstrfuncs.c
index 6712a64..0e2498f 100644
--- a/glib/gstrfuncs.c
+++ b/glib/gstrfuncs.c
@@ -1293,6 +1293,8 @@ g_strerror (gint errnum)
           if (error)
             g_print ("%s\n", error->message);
         }
+      else if (msg == (const gchar *)buf)
+        msg = g_strdup (buf);
 
       g_hash_table_insert (errors, GINT_TO_POINTER (errnum), (char *) msg);
     }