gtk: Put private functions in headers and include those

This is part of a bunch of fixes for gcc complaining about
-Wmissing-declarations.

It puts functions into headers and includes those headers both where the
functions are defined and where they function are used.

1 files changed, 1 insertions, 0 deletions

diff --git a/gtk/gtkroundedbox.c b/gtk/gtkroundedbox.c
index 2b11982489..4aeffcde05 100644
--- a/gtk/gtkroundedbox.c
+++ b/gtk/gtkroundedbox.c
@@ -152,6 +152,7 @@ gtk_css_border_radius_grow (GtkRoundedBoxCorner *corner,
       corner->vertical = 0;
     }
 }
+
 void
 _gtk_rounded_box_grow (GtkRoundedBox *box,
                        double         top,