[balsa/wip/gtk4: 27/351] Bump gtk-required to 4.0

[Peter Bloomfield <peterb src gnome org>]

commit f3d25e7b4eddeea797971ddbf78507edcafaccf0
Author: Peter Bloomfield <PeterBloomfield bellsouth net>
Date:   Fri Oct 13 21:06:20 2017 -0400

    Bump gtk-required to 4.0

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index f6d3dec..c41cc77 100644
--- a/configure.ac
+++ b/configure.ac
@@ -234,7 +234,7 @@ LIBS="$LIBS -lz"
 
 PKG_CHECK_MODULES(BALSA, [
 glib-2.0 >= 2.40.0
-gtk+-3.0 >= 3.10.0
+gtk+-4.0
 gmime-2.6
 gio-2.0
 gthread-2.0