settings: provide a way to disable asking for locked screen's width

src/ncmpcpp.cpp

@@ -1724,16 +1724,20 @@ int main(int argc, char *argv[])
 			}
 			else
 			{
-				LockStatusbar();
-				Statusbar() << "% of the locked screen's width to be reserved (20-80): ";
-				std::string str_part = wFooter->GetString(IntoStr(Config.locked_screen_width_part*100));
-				UnlockStatusbar();
-				if (str_part.empty())
-					continue;
-				unsigned part = StrToInt(str_part);
+				int part = Config.locked_screen_width_part*100;
+				if (Config.ask_for_locked_screen_width_part)
+				{
+					LockStatusbar();
+					Statusbar() << "% of the locked screen's width to be reserved (20-80): ";
+					std::string str_part = wFooter->GetString(IntoStr(Config.locked_screen_width_part*100));
+					UnlockStatusbar();
+					if (str_part.empty())
+						continue;
+					part = StrToInt(str_part);
+				}
 				if (part < 20 || part > 80)
 				{
-					ShowMessage("Invalid number!");
+					ShowMessage("Invalid number (%d)!", part);
 					continue;
 				}
 				Config.locked_screen_width_part = part/100.0;

src/settings.cpp

@@ -446,6 +446,7 @@ void NcmpcppConfig::SetDefaults()
 	media_library_disable_two_column_mode = false;
 	discard_colors_if_item_is_selected = true;
 	store_lyrics_in_song_dir = false;
+	ask_for_locked_screen_width_part = true;
 	set_window_title = true;
 	mpd_port = 6600;
 	mpd_connection_timeout = 15;
@@ -1150,10 +1151,15 @@ void NcmpcppConfig::Read()
 			}
 			else if (name == "locked_screen_width_part")
 			{
-				unsigned part = StrToInt(v);
+				int part = StrToInt(v);
 				if (part)
 					locked_screen_width_part = part/100.0;
 			}
+			else if (name == "ask_for_locked_screen_width_part")
+			{
+				if (!v.empty())
+					ask_for_locked_screen_width_part = v == "yes";
+			}
 			else if (name == "song_window_title_format")
 			{
 				if (!v.empty() && MPD::Song::isFormatOk("song_window_title_format", v))

src/settings.h

@@ -257,6 +257,7 @@ struct NcmpcppConfig
 	bool media_library_disable_two_column_mode;
 	bool discard_colors_if_item_is_selected;
 	bool store_lyrics_in_song_dir;
+	bool ask_for_locked_screen_width_part;
 	
 	int mpd_port;
 	int mpd_connection_timeout;