card: remove const member function (#674)

card.cpp

@@ -1276,15 +1276,15 @@ uint32 card::get_rscale() {
 	temp.rscale = UINT32_MAX;
 	return rscale;
 }
-uint32 card::get_link_marker() const {
+uint32 card::get_link_marker() {
 	if(!(data.type & TYPE_LINK))
 		return 0;
 	return data.link_marker;
 }
-uint32 card::is_link_marker(uint32 dir) const {
+uint32 card::is_link_marker(uint32 dir) {
 	return get_link_marker() & dir;
 }
-uint32 card::get_linked_zone() const {
+uint32 card::get_linked_zone() {
 	if(!(data.type & TYPE_LINK) || current.location != LOCATION_MZONE || is_treated_as_not_on_field())
 		return 0;
 	uint32 zones = 0;
@@ -1340,7 +1340,7 @@ void card::get_linked_cards(card_set* cset) {
 	pduel->game_field->get_cards_in_zone(cset, linked_zone, p, LOCATION_MZONE);
 	pduel->game_field->get_cards_in_zone(cset, linked_zone >> 16, 1 - p, LOCATION_MZONE);
 }
-uint32 card::get_mutual_linked_zone() const {
+uint32 card::get_mutual_linked_zone() {
 	if(!(data.type & TYPE_LINK) || current.location != LOCATION_MZONE || is_treated_as_not_on_field())
 		return 0;
 	uint32 zones = 0;

card.h

@@ -262,11 +262,11 @@ public:
 	uint32 get_grave_race(uint8 playerid);
 	uint32 get_lscale();
 	uint32 get_rscale();
-	uint32 get_link_marker() const;
-	uint32 is_link_marker(uint32 dir) const;
-	uint32 get_linked_zone() const;
+	uint32 get_link_marker();
+	uint32 is_link_marker(uint32 dir);
+	uint32 get_linked_zone();
 	void get_linked_cards(card_set* cset);
-	uint32 get_mutual_linked_zone() const;
+	uint32 get_mutual_linked_zone();
 	void get_mutual_linked_cards(card_set * cset);
 	int32 is_link_state();
 	int32 is_extra_link_state();