[gimp] Bug 672100: gimptool returns wrong system plugin dir if libdir has been customized.

[Jehan Pagès <jehanp src gnome org>]

commit 97d14ebda3d5790b92f8bfa2a4b3291ccb9289e6
Author: Jehan <jehan girinstud io>
Date:   Thu Jul 4 22:11:47 2013 +0900

    Bug 672100: gimptool returns wrong system plugin dir if libdir has been customized.
    
    On UNIX platforms, use the actual libdir value, which has been set at compile time.

 tools/gimptool.c |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)
---
diff --git a/tools/gimptool.c b/tools/gimptool.c
index 4a7bac4..f75545a 100644
--- a/tools/gimptool.c
+++ b/tools/gimptool.c
@@ -554,6 +554,7 @@ do_install_nogimpui (const gchar *what)
 static gchar *
 get_sys_plugin_dir (gboolean forward_slashes)
 {
+#ifdef G_OS_WIN32
   const gchar *rprefix;
 
   rprefix = get_runtime_prefix (forward_slashes ? '/' : G_DIR_SEPARATOR);
@@ -564,6 +565,14 @@ get_sys_plugin_dir (gboolean forward_slashes)
                        GIMP_PLUGIN_VERSION,
                        "plug-ins",
                        NULL);
+#else
+  return g_build_path (forward_slashes ? "/" : G_DIR_SEPARATOR_S,
+                       LIBDIR,
+                       "gimp",
+                       GIMP_PLUGIN_VERSION,
+                       "plug-ins",
+                       NULL);
+#endif
 }
 
 static void