[gimp] fix gtk version

[Jehan <jehanp src gnome org>]

commit 4d74452444fd619502846354c004dfef6656c3ba
Author: lillolollo <4179-lillolollo users noreply gitlab gnome org>
Date:   Tue Aug 6 13:46:53 2019 +0000

    fix gtk version

 autogen.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/autogen.sh b/autogen.sh
index a1c9d325cb..13b819f46d 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -251,7 +251,7 @@ fi
 if test -z "$ACLOCAL_FLAGS"; then
 
     acdir=`$ACLOCAL --print-ac-dir`
-    m4list="glib-2.0.m4 glib-gettext.m4 gtk-2.0.m4 intltool.m4 pkg.m4"
+    m4list="glib-2.0.m4 glib-gettext.m4 gtk-3.0.m4 intltool.m4 pkg.m4"
 
     for file in $m4list
     do