hw: missing initialization in signal handler

fix #951

base-hw/src/core/kernel/signal_receiver.cc

@@ -72,8 +72,14 @@ Signal_context::~Signal_context() { _receiver->_context_killed(this); }
 
 Signal_context::Signal_context(Signal_receiver * const r, unsigned const imprint)
 :
-	_deliver_fe(this), _contexts_fe(this), _receiver(r),
-	_imprint(imprint), _submits(0), _ack(1), _kill(0), _killer(0),
+	_deliver_fe(this),
+	_contexts_fe(this),
+	_receiver(r),
+	_imprint(imprint),
+	_submits(0),
+	_ack(1),
+	_kill(0),
+	_killer(0),
 	_ack_handler(&_default_ack_handler)
 {
 	if (r->_add_context(this)) { throw Assign_to_receiver_failed(); }

base-hw/src/core/kernel/signal_receiver.h

@@ -125,7 +125,11 @@ class Kernel::Signal_handler
 		/**
 		 * Constructor
 		 */
-		Signal_handler() : _handlers_fe(this) { }
+		Signal_handler()
+		:
+			_handlers_fe(this),
+			_receiver(0)
+		{ }
 
 		/**
 		 * Destructor
@@ -495,7 +499,12 @@ class Kernel::Signal_receiver
 		/**
 		 * Constructor
 		 */
-		Signal_receiver() : _kill(0), _killer(0), _context_kills(0) { }
+		Signal_receiver()
+		:
+			_kill(0),
+			_killer(0),
+			_context_kills(0)
+		{ }
 
 		/**
 		 * Let a handler 'h' wait for signals of the receiver