[gnome-control-center] [common] Fix theme engine detection on non-UNIX platforms

[Jens Granseuer <jensg src gnome org>]

commit aee9b4affdecf2bce84616004b6a6d51ae368594
Author: Jens Granseuer <jensgr gmx net>
Date:   Sun May 3 15:57:30 2009 +0200

    [common] Fix theme engine detection on non-UNIX platforms
    
    Use g_module_build_path to construct the module name so we don't break
    on platforms that don't use the .so suffix (bug #581156)
---
 capplets/common/ChangeLog          |    8 ++++++++
 capplets/common/gnome-theme-info.c |    5 ++---
 2 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/capplets/common/ChangeLog b/capplets/common/ChangeLog
index e7b69ae..2c6b6be 100644
--- a/capplets/common/ChangeLog
+++ b/capplets/common/ChangeLog
@@ -1,3 +1,11 @@
+2009-05-03  Jens Granseuer  <jensgr gmx net>
+
+	Patch by: <yselkowitz users sourceforge net>
+
+	* gnome-theme-info.c (gtk_theme_info_missing_engine): fix theme
+	engine lookups on platforms that don't use .so by using
+	g_module_build_path (bug #581156)
+
 2009-04-14  Jens Granseuer  <jensgr gmx net>
 
 	* gtkrc-utils.c: (gtkrc_get_details): close gtkrc files after use so
diff --git a/capplets/common/gnome-theme-info.c b/capplets/common/gnome-theme-info.c
index dab8c0a..efe4a58 100644
--- a/capplets/common/gnome-theme-info.c
+++ b/capplets/common/gnome-theme-info.c
@@ -6,6 +6,7 @@
 #include <sys/stat.h>
 #include <dirent.h>
 #include <glib/gi18n.h>
+#include <gmodule.h>
 #include <gtk/gtk.h>
 #include <gdk/gdkx.h>
 #include <gio/gio.h>
@@ -1440,10 +1441,8 @@ gtk_theme_info_missing_engine (const gchar *gtk_theme, gboolean nameOnly)
     g_free (gtkrc);
 
     for (l = engines; l; l = l->next) {
-      gchar *lib = g_strconcat ("lib", l->data, ".so", NULL);
-      gchar *full = g_build_filename (GTK_ENGINE_DIR, lib, NULL);
+      gchar *full = g_module_build_path (GTK_ENGINE_DIR, l->data);
 
-      g_free (lib);
       found = g_file_test (full, G_FILE_TEST_EXISTS);
 
       if (!found) {