[gnome-builder] configuration: prepare configuration when changing runtimes

[Christian Hergert <chergert src gnome org>]

commit b3cdb2fbe80c998dedd03f783a829e2eec26e3ce
Author: Christian Hergert <chergert redhat com>
Date:   Fri Mar 31 11:44:41 2017 -0600

    configuration: prepare configuration when changing runtimes
    
    When changing the runtime, we might need to alter the installation prefix.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=780775

 libide/buildsystem/ide-configuration.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/libide/buildsystem/ide-configuration.c b/libide/buildsystem/ide-configuration.c
index c2a2c2d..236c4fe 100644
--- a/libide/buildsystem/ide-configuration.c
+++ b/libide/buildsystem/ide-configuration.c
@@ -798,6 +798,7 @@ ide_configuration_set_runtime_id (IdeConfiguration *self,
     {
       IdeRuntimeManager *runtime_manager;
       IdeContext *context;
+      IdeRuntime *runtime;
 
       g_free (priv->runtime_id);
       priv->runtime_id = g_strdup (runtime_id);
@@ -809,6 +810,10 @@ ide_configuration_set_runtime_id (IdeConfiguration *self,
       runtime_manager = ide_context_get_runtime_manager (context);
       ide_configuration_runtime_manager_items_changed (self, 0, 0, 0, runtime_manager);
 
+      runtime = ide_configuration_get_runtime (self);
+      if (runtime != NULL)
+        ide_runtime_prepare_configuration (runtime, self);
+
       ide_configuration_set_dirty (self, TRUE);
       ide_configuration_emit_changed (self);
     }