gtk: Update count of Ubuntu releases.

diff --git a/src/gtk/README b/src/gtk/README
index 7c4ec3daf2bafbc7f815ddebfe6817aeca8ad0d7..5643268804b0904a9715f60cb7a9b6186f091c6b 100644 (file)
--- a/src/gtk/README
+++ b/src/gtk/README
@@ -13,7 +13,7 @@ require access to private members of their supertypes, so they need
 a struct declaration matching the private declaration in the toolkit.
 
 The trick: Select an implementation of the special widgets that is
-compatible with your system's toolkit.  Three are provided and
+compatible with your system's toolkit.  Four are provided and
 correspond to recent Ubuntu releases.  If your system is using a
 matching or "close enough" version of the toolkit, you will get a
 treat.