playlist_print: use bool instead of int

Return true on success, instead of 0.  Converted the "detail"
parameter to bool.

src/command.c

@@ -686,26 +686,30 @@ handle_load(struct client *client, G_GNUC_UNUSED int argc, char *argv[])
 static enum command_return
 handle_listplaylist(struct client *client, G_GNUC_UNUSED int argc, char *argv[])
 {
-	int ret;
+	bool ret;
 
-	ret = spl_print(client, argv[1], 0);
-	if (ret == -1)
+	ret = spl_print(client, argv[1], false);
+	if (!ret) {
 		command_error(client, ACK_ERROR_NO_EXIST, "No such playlist");
+		return COMMAND_RETURN_ERROR;
+	}
 
-	return ret;
+	return COMMAND_RETURN_OK;
 }
 
 static enum command_return
 handle_listplaylistinfo(struct client *client,
 			G_GNUC_UNUSED int argc, char *argv[])
 {
-	int ret;
+	bool ret;
 
-	ret = spl_print(client, argv[1], 1);
-	if (ret == -1)
+	ret = spl_print(client, argv[1], true);
+	if (!ret) {
 		command_error(client, ACK_ERROR_NO_EXIST, "No such playlist");
+		return COMMAND_RETURN_ERROR;
+	}
 
-	return ret;
+	return COMMAND_RETURN_OK;
 }
 
 static enum command_return

src/playlist_print.c

@@ -23,24 +23,24 @@
 #include "database.h"
 #include "client.h"
 
-int
-spl_print(struct client *client, const char *name_utf8, int detail)
+bool
+spl_print(struct client *client, const char *name_utf8, bool detail)
 {
 	GPtrArray *list;
 
 	list = spl_load(name_utf8);
 	if (list == NULL)
-		return -1;
+		return false;
 
 	for (unsigned i = 0; i < list->len; ++i) {
 		const char *temp = g_ptr_array_index(list, i);
-		int wrote = 0;
+		bool wrote = false;
 
 		if (detail) {
 			struct song *song = db_get_song(temp);
 			if (song) {
 				song_print_info(client, song);
-				wrote = 1;
+				wrote = true;
 			}
 		}
 
@@ -50,5 +50,5 @@ spl_print(struct client *client, const char *name_utf8, int detail)
 	}
 
 	spl_free(list);
-	return 0;
+	return true;
 }

src/playlist_print.h

@@ -19,9 +19,11 @@
 #ifndef PLAYLIST_PRINT_H
 #define PLAYLIST_PRINT_H
 
+#include <stdbool.h>
+
 struct client;
 
-int
-spl_print(struct client *client, const char *name_utf8, int detail);
+bool
+spl_print(struct client *client, const char *name_utf8, bool detail);
 
 #endif