do not limit year tag to 4 digits

src/search_engine.cpp

@@ -154,7 +154,7 @@ void SearchEngine::EnterPressed()
 		case 8:
 		{
 			Statusbar() << fmtBold << "Year: " << fmtBoldEnd;
-			itsPattern.SetYear(wFooter->GetString(itsPattern.GetYear(), 4));
+			itsPattern.SetYear(wFooter->GetString(itsPattern.GetYear()));
 			*w->Current().first << fmtBold << "Year:     " << fmtBoldEnd << ' ' << ShowTag(itsPattern.GetYear());
 			break;
 		}

src/song.cpp

@@ -240,7 +240,7 @@ void Song::SetYear(const string &str)
 {
 	if (itsSong->date)
 		str_pool_put(itsSong->date);
-	itsSong->date = str.empty() ? 0 : str_pool_get(IntoStr(StrToInt(str)).c_str());
+	itsSong->date = str.empty() ? 0 : str_pool_get(str.c_str());
 }
 
 void Song::SetYear(int year)