[PATCH] Fix handlig for gboolean mce_bt_set field

[Rafal Michalski <michalski.raf@gmail.com>]

Expression (sigvalue & MCE_RADIO_STATE_BLUETOOTH) is invalid because it makes
wrong assumption about that it evaluates to TRUE, when bit
MCE_RADIO_STATE_BLUETOOTH is set. In this case, assignment
mce_bt_set = (sigvalue & MCE_RADIO_STATE_BLUETOOTH) makes that gboolean
"mce_bt_set" receives value equal 8 instead of TRUE (equal 1). So condition in
"if (mce_bt_set == powered)" statement will never evaluate to true because
gboolean "powered" receives only TRUE (equal 1) or FALSE (equal 0) value.
We should remember that gboolean type is not bool type in C++ sense.
It's simply typedef of gint (int), so assignmnet:
mce_bt_set = (sigvalue & MCE_RADIO_STATE_BLUETOOTH) is valid for compiler but
in our case it makes a bug. So normalization (double negation) in assignment:
mce_bt_set = !!(sigvalue & MCE_RADIO_STATE_BLUETOOTH) preserves that
"mce_bt_set" will receive only TRUE or FALSE value.
---
 plugins/maemo6.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/plugins/maemo6.c b/plugins/maemo6.c
index c96731d..c396db0 100644
--- a/plugins/maemo6.c
+++ b/plugins/maemo6.c
@@ -71,7 +71,7 @@ static gboolean mce_signal_callback(DBusConnection *connection,
 
 		/* set the adapter according to the mce signal
 		   and remember the value */
-		mce_bt_set = sigvalue & MCE_RADIO_STATE_BLUETOOTH;
+		mce_bt_set = !!(sigvalue & MCE_RADIO_STATE_BLUETOOTH);
 
 		if (mce_bt_set)
 			btd_adapter_switch_online(adapter);
-- 
1.6.3.3