use specific stringstream types

src/game/boe.actions.cpp

@@ -502,7 +502,7 @@ static void handle_look(location destination, bool& need_redraw, bool& need_repr
 void handle_move(location destination, bool& did_something, bool& need_redraw, bool& need_reprint) {
 	if(recording) {
 		// record the action
-		std::stringstream out;
+		std::ostringstream out;
 		out << destination;
 		record_action("move", out.str());
 	}

src/game/boe.main.cpp

@@ -269,7 +269,7 @@ void replay_next_action() {
 		finish_load_party();
 	}else if(t == "move"){
 		location l;
-		std::stringstream sstr(next_action->GetText());
+		std::istringstream sstr(next_action->GetText());
 		sstr >> l;
 		handle_move(l, did_something, need_redraw, need_reprint);
 	}

src/game/boe.startup.cpp

@@ -30,7 +30,6 @@
 using std::vector;
 
 #include <sstream>
-using std::stringstream;
 
 extern bool party_in_memory;
 extern long register_flag;
@@ -43,7 +42,7 @@ enum_map(eStartButton, rectangle) startup_button;
 
 void handle_startup_button_click(eStartButton btn) {
 	if(recording){
-		stringstream sstr;
+		std::ostringstream sstr;
 		sstr << btn;
 		record_action("startup_button_click", sstr.str());
 	}

test/replay_parse.cpp

@@ -6,13 +6,13 @@
 TEST_CASE("Parsing and stringifying locations") {
 	SECTION("Stringifying") {
         location l(27, 923);
-        std::stringstream out;
+        std::ostringstream out;
         out << l;
         CHECK(out.str() == "(27,923)");
     }
 	SECTION("Parsing") {
         location l;
-        std::stringstream in("(27,923)");
+        std::istringstream in("(27,923)");
         in >> l;
         CHECK(l.x == 27);
         CHECK(l.y == 923);