don't set default value for mpd_music_dir

doc/config

@@ -13,7 +13,7 @@
 #
 #mpd_port = "6600"
 #
-#mpd_music_dir = "/var/lib/mpd/music"
+#mpd_music_dir = ""
 #
 #mpd_connection_timeout = "5"
 #

src/ncmpcpp.cpp

@@ -38,6 +38,13 @@
 #include "status_checker.h"
 #include "tag_editor.h"
 
+#define CHECK_MPD_MUSIC_DIR \
+			if (Config.mpd_music_dir.empty()) \
+			{ \
+				ShowMessage("configuration variable mpd_music_dir is not set!"); \
+				continue; \
+			}
+
 #define REFRESH_MEDIA_LIBRARY_SCREEN \
 			do { \
 				mLibArtists->Display(redraw_screen); \
@@ -2501,6 +2508,7 @@ int main(int argc, char *argv[])
 		}
 		else if (Keypressed(input, Key.EditTags))
 		{
+			CHECK_MPD_MUSIC_DIR;
 #			ifdef HAVE_TAGLIB_H
 			if (wCurrent == mLibArtists)
 			{
@@ -3484,6 +3492,7 @@ int main(int argc, char *argv[])
 #		ifdef HAVE_TAGLIB_H
 		else if (Keypressed(input, Key.TagEditor))
 		{
+			CHECK_MPD_MUSIC_DIR;
 			if (current_screen != csTagEditor && current_screen != csTinyTagEditor)
 			{
 				CLEAR_FIND_HISTORY;

src/settings.cpp

@@ -219,7 +219,6 @@ void DefaultConfiguration(ncmpcpp_config &conf)
 {
 	conf.mpd_host = "localhost";
 	conf.mpd_password = "";
-	conf.mpd_music_dir = "/var/lib/mpd/music/";
 	conf.song_list_format = "{%a - }{%t}|{[.white]%f[/white]}%r{[.green](%l)[/green]}";
 	conf.song_columns_list_format = "(8)[green]{l} (25)[cyan]{a} (40){t} (30)[red]{b}";
 	conf.song_status_format = "{(%l) }{%a - }{%t}|{%f}";