[anjuta] language-support-cpp-java: Remove a critical warning when Anjuta is closed

[Sebastien Granjoux <sgranjoux src gnome org>]

commit b093ba4454cec56a2d3adcab40b4c6f5f9fff2d2
Author: Sébastien Granjoux <seb sfo free fr>
Date:   Sat Feb 22 19:29:15 2014 +0100

    language-support-cpp-java: Remove a critical warning when Anjuta is closed

 plugins/language-support-cpp-java/cpp-packages.c |   11 ++++++++---
 1 files changed, 8 insertions(+), 3 deletions(-)
---
diff --git a/plugins/language-support-cpp-java/cpp-packages.c 
b/plugins/language-support-cpp-java/cpp-packages.c
index 3c4cb69..131c5a4 100644
--- a/plugins/language-support-cpp-java/cpp-packages.c
+++ b/plugins/language-support-cpp-java/cpp-packages.c
@@ -403,10 +403,15 @@ cpp_packages_finalize (GObject* object)
 {
        CppPackages *packages = CPP_PACKAGES (object);
        AnjutaShell* shell = packages->plugin->shell;
-       IAnjutaProjectManager* pm =
-               anjuta_shell_get_interface (shell, IAnjutaProjectManager, NULL);
        
-       g_signal_handlers_disconnect_by_func (pm, cpp_packages_load_real, packages);
+       if (shell != NULL)
+       {
+               IAnjutaProjectManager* pm =
+                       anjuta_shell_get_interface (shell, IAnjutaProjectManager, NULL);
+
+               if (pm != NULL) 
+                       g_signal_handlers_disconnect_by_func (pm, cpp_packages_load_real, packages);
+       }
 
        G_OBJECT_CLASS (cpp_packages_parent_class)->finalize (object);
 }