sticker: added sticker_delete_value()

sticker_delete_value() deletes only one value in a sticker, while
the old function sticker_delete() deletes all values.

1 files changed, 7 insertions, 0 deletions

diff --git a/src/sticker.h b/src/sticker.h
index 5daba3de..8e641091 100644
--- a/src/sticker.h
+++ b/src/sticker.h
@@ -89,6 +89,13 @@ bool
 sticker_delete(const char *type, const char *uri);
 
 /**
+ * Deletes a sticker value.  Fails if no sticker with this name
+ * exists.
+ */
+bool
+sticker_delete_value(const char *type, const char *uri, const char *name);
+
+/**
  * Frees resources held by the sticker object.
  *
  * @param sticker the sticker object to be freed