[glib] giomodule: return a copy of module name

[Ignacio Casal Quinteiro <icq src gnome org>]

commit 3bb8294e00608238c2a28753425c9ce332c2bc0e
Author: Víctor Manuel Jáquez Leal <vjaquez igalia com>
Date:   Thu Oct 22 10:36:00 2015 +0200

    giomodule: return a copy of module name
    
    This is a regression from commit 6dedc0.
    
    The clients expect to free the received module name, so the function
    must return a copy.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=756952

 gio/giomodule.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gio/giomodule.c b/gio/giomodule.c
index eb5cb55..da7c167 100644
--- a/gio/giomodule.c
+++ b/gio/giomodule.c
@@ -1036,7 +1036,7 @@ get_gio_module_dir (void)
 #endif
       g_free (install_dir);
 #else
-      module_dir = GIO_MODULE_DIR;
+      module_dir = g_strdup (GIO_MODULE_DIR);
 #endif
     }