[gnome-system-monitor] Properly clear the selected process before looking for another (bug 580009)

[Chris KÃhl <chriskuehl src gnome org>]

commit 11e508347c5af1389b2da1c787adcb26cb0ebbef
Author: Robert Roth <robert roth off gmail com>
Date:   Sun Nov 6 08:45:23 2011 +0200

    Properly clear the selected process before looking for another (bug 580009)

 src/callbacks.cpp |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/src/callbacks.cpp b/src/callbacks.cpp
index 7b93a1a..251eebd 100644
--- a/src/callbacks.cpp
+++ b/src/callbacks.cpp
@@ -290,6 +290,8 @@ cb_row_selected (GtkTreeSelection *selection, gpointer data)
 
     procdata->selection = selection;
 
+    procdata->selected_process = NULL;
+
     /* get the most recent selected process and determine if there are
     ** no selected processes
     */