Fix crash when tween control object previous freed

scene/animation/tween.cpp

@@ -1045,6 +1045,7 @@ bool Tween::interpolate_property(Object *p_object
 	if(p_final_val.get_type() == Variant::INT) p_final_val = p_final_val.operator real_t();
 
 	ERR_FAIL_COND_V(p_object == NULL, false);
+	ERR_FAIL_COND_V(!ObjectDB::instance_validate(p_object), false);
 	ERR_FAIL_COND_V(p_initial_val.get_type() != p_final_val.get_type(), false);
 	ERR_FAIL_COND_V(p_times_in_sec <= 0, false);
 	ERR_FAIL_COND_V(p_trans_type < 0 || p_trans_type >= TRANS_COUNT, false);
@@ -1104,6 +1105,7 @@ bool Tween::interpolate_method(Object *p_object
 	if(p_final_val.get_type() == Variant::INT) p_final_val = p_final_val.operator real_t();
 
 	ERR_FAIL_COND_V(p_object == NULL, false);
+	ERR_FAIL_COND_V(!ObjectDB::instance_validate(p_object), false);
 	ERR_FAIL_COND_V(p_initial_val.get_type() != p_final_val.get_type(), false);
 	ERR_FAIL_COND_V(p_times_in_sec <= 0, false);
 	ERR_FAIL_COND_V(p_trans_type < 0 || p_trans_type >= TRANS_COUNT, false);
@@ -1154,7 +1156,9 @@ bool Tween::interpolate_callback(Object *p_object
 		);
 		return true;
 	}
+
 	ERR_FAIL_COND_V(p_object == NULL, false);
+	ERR_FAIL_COND_V(!ObjectDB::instance_validate(p_object), false);
 	ERR_FAIL_COND_V(p_times_in_sec < 0, false);
 
 	ERR_EXPLAIN("Object has no callback named: %s" + p_callback);
@@ -1219,6 +1223,7 @@ bool Tween::interpolate_deferred_callback(Object *p_object
 		return true;
 	}
 	ERR_FAIL_COND_V(p_object == NULL, false);
+	ERR_FAIL_COND_V(!ObjectDB::instance_validate(p_object), false);
 	ERR_FAIL_COND_V(p_times_in_sec < 0, false);
 
 	ERR_EXPLAIN("Object has no callback named: %s" + p_callback);
@@ -1291,7 +1296,9 @@ bool Tween::follow_property(Object *p_object
 	if(p_initial_val.get_type() == Variant::INT) p_initial_val = p_initial_val.operator real_t();
 
 	ERR_FAIL_COND_V(p_object == NULL, false);
+	ERR_FAIL_COND_V(!ObjectDB::instance_validate(p_object), false);
 	ERR_FAIL_COND_V(p_target == NULL, false);
+	ERR_FAIL_COND_V(!ObjectDB::instance_validate(p_target), false);
 	ERR_FAIL_COND_V(p_times_in_sec <= 0, false);
 	ERR_FAIL_COND_V(p_trans_type < 0 || p_trans_type >= TRANS_COUNT, false);
 	ERR_FAIL_COND_V(p_ease_type < 0 || p_ease_type >= EASE_COUNT, false);
@@ -1357,7 +1364,9 @@ bool Tween::follow_method(Object *p_object
 	if(p_initial_val.get_type() == Variant::INT) p_initial_val = p_initial_val.operator real_t();
 
 	ERR_FAIL_COND_V(p_object == NULL, false);
+	ERR_FAIL_COND_V(!ObjectDB::instance_validate(p_object), false);
 	ERR_FAIL_COND_V(p_target == NULL, false);
+	ERR_FAIL_COND_V(!ObjectDB::instance_validate(p_target), false);
 	ERR_FAIL_COND_V(p_times_in_sec <= 0, false);
 	ERR_FAIL_COND_V(p_trans_type < 0 || p_trans_type >= TRANS_COUNT, false);
 	ERR_FAIL_COND_V(p_ease_type < 0 || p_ease_type >= EASE_COUNT, false);
@@ -1424,7 +1433,9 @@ bool Tween::targeting_property(Object *p_object
 	if(p_final_val.get_type() == Variant::INT) p_final_val = p_final_val.operator real_t();
 
 	ERR_FAIL_COND_V(p_object == NULL, false);
+	ERR_FAIL_COND_V(!ObjectDB::instance_validate(p_object), false);
 	ERR_FAIL_COND_V(p_initial == NULL, false);
+	ERR_FAIL_COND_V(!ObjectDB::instance_validate(p_initial), false);
 	ERR_FAIL_COND_V(p_times_in_sec <= 0, false);
 	ERR_FAIL_COND_V(p_trans_type < 0 || p_trans_type >= TRANS_COUNT, false);
 	ERR_FAIL_COND_V(p_ease_type < 0 || p_ease_type >= EASE_COUNT, false);
@@ -1495,7 +1506,9 @@ bool Tween::targeting_method(Object *p_object
 	if(p_final_val.get_type() == Variant::INT) p_final_val = p_final_val.operator real_t();
 
 	ERR_FAIL_COND_V(p_object == NULL, false);
+	ERR_FAIL_COND_V(!ObjectDB::instance_validate(p_object), false);
 	ERR_FAIL_COND_V(p_initial == NULL, false);
+	ERR_FAIL_COND_V(!ObjectDB::instance_validate(p_initial), false);
 	ERR_FAIL_COND_V(p_times_in_sec <= 0, false);
 	ERR_FAIL_COND_V(p_trans_type < 0 || p_trans_type >= TRANS_COUNT, false);
 	ERR_FAIL_COND_V(p_ease_type < 0 || p_ease_type >= EASE_COUNT, false);