[gnome-builder] build-tools: fix configuration selection

[Christian Hergert <chergert src gnome org>]

commit 7b308c60f0849ba31222dadc3c44dc78333a60df
Author: Christian Hergert <chergert redhat com>
Date:   Mon Jun 27 17:24:23 2016 -0700

    build-tools: fix configuration selection
    
    This moved to a getter from the GObject data.

 plugins/build-tools/gbp-build-perspective.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/plugins/build-tools/gbp-build-perspective.c b/plugins/build-tools/gbp-build-perspective.c
index 9f45d7f..0ae18dc 100644
--- a/plugins/build-tools/gbp-build-perspective.c
+++ b/plugins/build-tools/gbp-build-perspective.c
@@ -393,11 +393,14 @@ find_configuration_row (GtkWidget *widget,
     IdeConfiguration *config;
     GtkWidget        *row;
   } *lookup = data;
+  GbpBuildConfigurationRow *row = (GbpBuildConfigurationRow *)widget;
+
+  g_assert (GBP_IS_BUILD_CONFIGURATION_ROW (row));
 
   if (lookup->row != NULL)
     return;
 
-  if (lookup->config == g_object_get_data (G_OBJECT (widget), "IDE_CONFIGURATION"))
+  if (lookup->config == gbp_build_configuration_row_get_configuration (row))
     lookup->row = widget;
 }