[anjuta] language-support-vala: fix a crash with the directory project backend

[Abderrahim Kitouni <akitouni src gnome org>]

commit 6661f6d414e7cc6ba08c1140f9b2fbc919f36f7f
Author: Abderrahim Kitouni <a kitouni gmail com>
Date:   Sat Dec 3 10:49:46 2011 +0100

    language-support-vala: fix a crash with the directory project backend

 plugins/language-support-vala/plugin.vala |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/plugins/language-support-vala/plugin.vala b/plugins/language-support-vala/plugin.vala
index f1cd9b0..b0ebab9 100644
--- a/plugins/language-support-vala/plugin.vala
+++ b/plugins/language-support-vala/plugin.vala
@@ -132,6 +132,8 @@ public class ValaPlugin : Plugin {
 			return;
 
 		var current_target = current_src.parent_type (Anjuta.ProjectNodeType.TARGET);
+		if (current_target == null)
+			return;
 
 		current_target.foreach (TraverseType.PRE_ORDER, (node) => {
 			if (!(Anjuta.ProjectNodeType.SOURCE in node.get_node_type ()))