Use std::tm instead of plain C tm

(cherry-picked from commit 36e83e6)

src/format_time_summary.cpp

@@ -22,19 +22,19 @@ namespace utils {
 
 std::string format_time_summary(std::time_t t) {
 	std::time_t curtime = std::time(nullptr);
-	const struct tm* timeptr = std::localtime(&curtime);
+	const std::tm* timeptr = std::localtime(&curtime);
 	if(timeptr == nullptr) {
 		return "";
 	}
 
-	const struct tm current_time = *timeptr;
+	const std::tm current_time = *timeptr;
 
 	timeptr = std::localtime(&t);
 	if(timeptr == nullptr) {
 		return "";
 	}
 
-	const struct tm save_time = *timeptr;
+	const std::tm save_time = *timeptr;
 
 	std::string format_string;
 

src/gui/dialogs/debug_clock.cpp

@@ -175,7 +175,7 @@ debug_clock::time::time() : hour(0), minute(0), second(0), millisecond(0)
 void debug_clock::time::set_current_time()
 {
 	std::time_t now = ::std::time(nullptr);
-	tm* stamp = std::localtime(&now);
+	std::tm* stamp = std::localtime(&now);
 
 	hour = stamp->tm_hour;
 	minute = stamp->tm_min;

src/save_index.cpp

@@ -213,7 +213,7 @@ const config& save_info::summary() const
 
 std::string save_info::format_time_local() const
 {
-	if(tm* tm_l = std::localtime(&modified())) {
+	if(std::tm* tm_l = std::localtime(&modified())) {
 		const std::string format = preferences::use_twelve_hour_clock_format()
 			? _("%a %b %d %I:%M %p %Y")
 			: _("%a %b %d %H:%M %Y");

src/server/ban.cpp

@@ -329,7 +329,7 @@ static lg::log_domain log_server("server");
 		if (!time) return false;
 
 		if (duration.substr(0,4) == "TIME") {
-			struct tm* loc;
+			std::tm* loc;
 			loc = std::localtime(time);
 
 			std::size_t number = 0;