[PATCH:xbacklight] Fix reading backlight level on 64-bit systems (bug 63205)

[Alan Coopersmith]

From: Edward Sheldrake <ejsheldrake at gmail.com>

obviously incorrect output of "xbacklight -get":
51671552015166906368.000000

valgrind reports an invalid read of size 8 at xbacklight.c:91

https://bugs.freedesktop.org/show_bug.cgi?id=63205

Signed-off-by: Alan Coopersmith <alan.coopersmith at oracle.com>
---
 xbacklight.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xbacklight.c b/xbacklight.c
index 2189095..27f9046 100644
--- a/xbacklight.c
+++ b/xbacklight.c
@@ -88,7 +88,7 @@ backlight_get (xcb_connection_t *conn, xcb_randr_output_t output)
 	prop_reply->format != 32) {
 	value = -1;
     } else {
-	value = *((long *) xcb_randr_get_output_property_data (prop_reply));
+	value = *((int32_t *) xcb_randr_get_output_property_data (prop_reply));
     }
 
     free (prop_reply);
-- 
1.7.9.2