[gimp] app: rename gimpimageviewable.[ch] to gimpimageproxy.[ch]

[Ell <ell src gnome org>]

commit 0ddd3330b8b30091e39ba2b758f26dbd84db0a12
Author: Ell <ell_se yahoo com>
Date:   Sun Nov 3 18:44:24 2019 +0200

    app: rename gimpimageviewable.[ch] to gimpimageproxy.[ch]
    
    ... in preparation for actually renaming the class, but as a
    separate step to keep the history.

 app/core/Makefile.am                               | 4 ++--
 app/core/{gimpimageviewable.c => gimpimageproxy.c} | 0
 app/core/{gimpimageviewable.h => gimpimageproxy.h} | 0
 3 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/app/core/Makefile.am b/app/core/Makefile.am
index dbd68a89bd..f8be7d57d4 100644
--- a/app/core/Makefile.am
+++ b/app/core/Makefile.am
@@ -333,10 +333,10 @@ libappcore_a_sources = \
        gimpimage-undo.h                        \
        gimpimage-undo-push.c                   \
        gimpimage-undo-push.h                   \
+       gimpimageproxy.c                        \
+       gimpimageproxy.h                        \
        gimpimageundo.c                         \
        gimpimageundo.h                         \
-       gimpimageviewable.c                     \
-       gimpimageviewable.h                     \
        gimpimagefile.c                         \
        gimpimagefile.h                         \
        gimpitem.c                              \
diff --git a/app/core/gimpimageviewable.c b/app/core/gimpimageproxy.c
similarity index 100%
rename from app/core/gimpimageviewable.c
rename to app/core/gimpimageproxy.c
diff --git a/app/core/gimpimageviewable.h b/app/core/gimpimageproxy.h
similarity index 100%
rename from app/core/gimpimageviewable.h
rename to app/core/gimpimageproxy.h