[gimp/gimp-2-10] libgimpwidgets: install gimpspinbutton.h

[Ell <ell src gnome org>]

commit 46d476869985013ea3e620240eaaf445bb3bc5e3
Author: Ell <ell_se yahoo com>
Date:   Mon Nov 19 09:27:01 2018 -0500

    libgimpwidgets: install gimpspinbutton.h
    
    Added in commit 7ab9ee268637093902ec243a30d6a96437eba3fc.
    
    (cherry picked from commit 03a928409a46c1255dae6e238cc0d89a07fe76bb)

 libgimpwidgets/Makefile.am | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/libgimpwidgets/Makefile.am b/libgimpwidgets/Makefile.am
index 4daca1789e..c195bc9e35 100644
--- a/libgimpwidgets/Makefile.am
+++ b/libgimpwidgets/Makefile.am
@@ -267,6 +267,7 @@ libgimpwidgetsinclude_HEADERS = \
        gimpscaleentry.h                \
        gimpscrolledpreview.h           \
        gimpsizeentry.h                 \
+       gimpspinbutton.h                \
        gimpstringcombobox.h            \
        gimpunitcombobox.h              \
        gimpunitmenu.h                  \