[gnome-software] Don't start a search if the entry is empty

[Matthias Clasen <matthiasc src gnome org>]

commit 8f6ba49aa19d17d2dd8628193501ceede69174f1
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Aug 30 00:19:34 2013 -0400

    Don't start a search if the entry is empty

 src/gs-shell.c |    8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)
---
diff --git a/src/gs-shell.c b/src/gs-shell.c
index e856b66..a4ae173 100644
--- a/src/gs-shell.c
+++ b/src/gs-shell.c
@@ -181,10 +181,14 @@ static void
 gs_shell_search_activated_cb (GtkEntry *entry, GsShell *shell)
 {
        GsShellPrivate *priv = shell->priv;
+        const gchar *text;
+
+        text = gtk_entry_get_text (entry);
+        if (text[0] == '\0')
+                return;
 
         if (gs_shell_get_mode (shell) == GS_SHELL_MODE_SEARCH) {
-                gs_shell_search_refresh (shell->priv->shell_search,
-                                         gtk_entry_get_text (entry));
+                gs_shell_search_refresh (shell->priv->shell_search, text);
         } else {
                 priv->search_back_id = priv->mode;
                 gs_shell_set_mode (shell, GS_SHELL_MODE_SEARCH);