[gnome-settings-daemon] power: Reset value to -1 when parsing failed

[Bastien Nocera <hadess src gnome org>]

commit e64a5d0b56d551c653027a6040ccfa28fbd101e5
Author: Bastien Nocera <hadess hadess net>
Date:   Wed Sep 7 16:32:35 2011 +0100

    power: Reset value to -1 when parsing failed
    
    When we fail to parse the value output of the backlight helper,
    also reset the value, as g_ascii_strtoll() returns 0 on failure.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=657364

 plugins/power/gsd-power-manager.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/plugins/power/gsd-power-manager.c b/plugins/power/gsd-power-manager.c
index af10b4f..80afa87 100644
--- a/plugins/power/gsd-power-manager.c
+++ b/plugins/power/gsd-power-manager.c
@@ -2264,6 +2264,7 @@ backlight_helper_get_value (const gchar *argument, GError **error)
 
         /* parsing error */
         if (endptr == stdout_data) {
+                value = -1;
                 g_set_error (error,
                              GSD_POWER_MANAGER_ERROR,
                              GSD_POWER_MANAGER_ERROR_FAILED,