Fix all the compile warnings that occur on Mac.

(Except the OpenGL deprecation warning and some warnings coming from Boost.Process.)

src/game/boe.actions.cpp

@@ -1311,6 +1311,7 @@ static void handle_party_death() {
 }
 
 void screen_shift(int dx, int dy, bool& need_redraw) {
+	(void) need_redraw; // Mark the variable unused
 	if(abs(dx) + abs(dy) == 0)
 		return;
 
@@ -2162,8 +2163,6 @@ void debug_magic_map() {
 	print_buf();
 }
 
-extern void outd_move_to_first_town_entrance(int town);
-
 void debug_enter_town() {
 	if(recording){
 		record_action("debug_enter_town", "");
@@ -2384,7 +2383,7 @@ std::map<char,key_action_t> debug_actions;
 std::map<char,key_action_t> startup_debug_actions;
 std::vector<std::vector<char>> debug_actions_help_order;
 
-void add_debug_action(std::vector<char> keys, std::string name, void (*action)(), bool startup_safe = false) {
+static void add_debug_action(std::vector<char> keys, std::string name, void (*action)(), bool startup_safe = false) {
 	key_action_t shortcut = {keys, name, action};
 	for(char ch: keys){
 		debug_actions[ch] = shortcut;
@@ -2523,7 +2522,7 @@ void init_debug_actions() {
 }
 
 // Later we might want to know whether the key is used or not
-bool handle_debug_key(char key) {
+static bool handle_debug_key(char key) {
 	if(!univ.debug_mode && key != 'D')
 		return false;
 	if(overall_mode == MODE_STARTUP){
@@ -4100,4 +4099,4 @@ void clear_trapped_monst() {
 	univ.party.imprisoned_monst.fill(0);
 	ASB("Debug: Captures souls cleared.");
 	print_buf();
-}
+}

src/game/boe.actions.hpp

@@ -39,6 +39,7 @@ void handle_death();
 void start_new_game(bool force = false);
 void start_tutorial();
 location get_cur_direction(location the_point);
+void outd_move_to_first_town_entrance(int town);
 bool outd_move_party(location destination,bool forced);
 bool town_move_party(location destination,short forced);
 bool someone_poisoned();

src/game/boe.dlgutil.cpp

@@ -107,7 +107,7 @@ short store_cur_pc = -1;
 
 // For healing shops, other PCs might be able to buy something if
 // the active PC can't
-bool start_shop_mode_other_pc(bool allow_empty = false) {
+static bool start_shop_mode_other_pc(bool allow_empty = false) {
 	// The shop might change the current PC multiple times, but we want to restore
 	// it to the original active PC when shopping ends, so only store if we're
 	// not yet storing
@@ -129,6 +129,7 @@ bool start_shop_mode_other_pc(bool allow_empty = false) {
 		}
 	}
 	if(!other_pc_can_buy && allow_empty){
+		univ.cur_pc = pc_buying;
 		start_shop_mode(active_shop_num,active_shop.getCostAdjust(),save_talk_str1,false,true);
 	}
 	return other_pc_can_buy;