str("") is unsafe on its own for clearing stream

src/scenedit/scen.actions.cpp

@@ -2447,7 +2447,7 @@ void set_up_main_screen() {
 	set_lb(-1,LB_TEXT,LB_EDIT_OUT,"Edit Outdoor Terrain");
 	set_lb(-1,LB_TEXT,LB_NO_ACTION,"",0);
 	set_lb(-1,LB_TEXT,LB_NO_ACTION,"Town/Dungeon Options");
-	strb.str("");
+	clear_sstr(strb);
 	strb << "  Town " << cur_town << ": " << town->name;
 	set_lb(-1,LB_TEXT,LB_NO_ACTION, strb.str());
 	set_lb(-1,LB_TEXT,LB_LOAD_TOWN,"Load Another Town");

src/scenedit/scen.core.cpp

@@ -646,7 +646,7 @@ static void put_monst_info_in_dlog(cDialog& me, cMonster& monst, mon_num_t which
 	me["pic"].setTextToNum(monst.picture_num);
 	strb << "Width = " << int(monst.x_width);
 	me["w"].setText(strb.str());
-	strb.str("");
+	clear_sstr(strb);
 	strb << "Height = " << int(monst.y_width);
 	me["h"].setText(strb.str());
 	me["level"].setTextToNum(monst.level);
@@ -704,7 +704,7 @@ static void put_monst_info_in_dlog(cDialog& me, cMonster& monst, mon_num_t which
 		case 122: summoned_by.push_back(eSpell::SUMMON_GUARDIAN); break;
 	}
 	
-	strb.str("");
+	clear_sstr(strb);
 	bool first = true;
 	if(summoned_by.empty())
 		strb << "None";
@@ -755,7 +755,7 @@ static bool check_monst_pic(cDialog& me, std::string id, bool losing, cMonster&
 		std::ostringstream strb;
 		strb << "Width = " << int(monst.x_width);
 		me["w"].setText(strb.str());
-		strb.str("");
+		clear_sstr(strb);
 		strb << "Height = " << int(monst.y_width);
 		me["h"].setText(strb.str());
 	}

src/scenedit/scen.fileio.cpp

@@ -609,7 +609,7 @@ void writeMonstersToXml(ticpp::Printer&& data, cScenario& scenario) {
 			if(monst.guard) data.PushElement("guard");
 			for(auto& p : monst.abil) {
 				if(p.first == eMonstAbil::NO_ABIL || !p.second.active) continue;
-				str.str("");
+				clear_sstr(str);
 				eMonstAbil abil = p.first;
 				uAbility& param = p.second;
 				switch(getMonstAbilCategory(abil)) {

src/scenedit/scen.graphics.cpp

@@ -1378,14 +1378,14 @@ void place_location() {
 	TextStyle style;
 	style.lineHeight = 12;
 	win_draw_string(mainPtr(), draw_rect, sout.str(), eTextMode::LEFT_TOP, style);
-	sout.str("");
+	clear_sstr(sout);
 	
 	moveTo = location(260 ,terrain_rects[255].top + 18);
 	draw_rect = text_rect;
 	draw_rect.offset(moveTo);
 	sout << current_terrain_type;
 	win_draw_string(mainPtr(), draw_rect, sout.str(), eTextMode::LEFT_TOP, style);
-	sout.str("");
+	clear_sstr(sout);
 	
 	if(overall_mode < MODE_MAIN_SCREEN) {
 		moveTo = location(5,terrain_rects[255].bottom + 121);

src/scenedit/scen.townout.cpp

@@ -1463,7 +1463,7 @@ static void put_out_loc_in_dlog(cDialog& me, location cur_loc, cScenario& scenar
 	std::ostringstream str;
 	str << "X = " << cur_loc.x;
 	me["x"].setText(str.str());
-	str.str("");
+	clear_sstr(str);
 	str << "Y = " << cur_loc.y;
 	me["y"].setText(str.str());
 	me["title"].setText(scenario.outdoors[cur_loc.x][cur_loc.y]->name);