add EFFECT_FLAG_CANNOT_INACTIVATE

Now is_chain_negatable() uses EFFECT_FLAG_CANNOT_INACTIVATE.
EFFECT_FLAG_CANNOT_INACTIVATE: activation cannot be negated

effect.cpp

@@ -168,7 +168,6 @@ int32 effect::check_count_limit(uint8 playerid) {
 }
 // check if an EFFECT_TYPE_ACTIONS effect can be activated
 // for triggering effects, it checks EFFECT_FLAG_DAMAGE_STEP, EFFECT_FLAG_SET_AVAILABLE
-// for continuous effect, it checks EFFECT_FLAG_AVAILABLE_BD
 int32 effect::is_activateable(uint8 playerid, const tevent& e, int32 neglect_cond, int32 neglect_cost, int32 neglect_target, int32 neglect_loc, int32 neglect_faceup) {
 	if(!(type & EFFECT_TYPE_ACTIONS))
 		return FALSE;

effect.h

@@ -184,7 +184,7 @@ enum effect_flag : uint32 {
 	EFFECT_FLAG_NO_TURN_RESET		= 0x400000,
 	EFFECT_FLAG_EVENT_PLAYER		= 0x800000,
 	EFFECT_FLAG_OWNER_RELATE		= 0x1000000,
-//	EFFECT_FLAG_AVAILABLE_BD		= 0x2000000,
+	EFFECT_FLAG_CANNOT_INACTIVATE	= 0x2000000,
 	EFFECT_FLAG_CLIENT_HINT			= 0x4000000,
 //	EFFECT_FLAG_CHAIN_UNIQUE		= 0x8000000,
 	EFFECT_FLAG_LIMIT_ZONE			= 0x10000000,

field.cpp

@@ -3129,7 +3129,7 @@ int32 field::is_chain_negatable(uint8 chaincount) {
 		peffect = core.current_chain.back().triggering_effect;
 	else
 		peffect = core.current_chain[chaincount - 1].triggering_effect;
-	if(peffect->is_flag(EFFECT_FLAG_CANNOT_DISABLE))
+	if(peffect->is_flag(EFFECT_FLAG_CANNOT_INACTIVATE))
 		return FALSE;
 	filter_field_effect(EFFECT_CANNOT_INACTIVATE, &eset);
 	for(int32 i = 0; i < eset.size(); ++i) {