[gegl] ui: only build if gexiv2 and sdl are present

[Øyvind Kolås <ok src gnome org>]

commit a8064f0a83f641a46a1778b91ce9609899956f87
Author: Øyvind Kolås <pippin gimp org>
Date:   Sat Nov 21 19:59:16 2015 +0100

    ui: only build if gexiv2 and sdl are present

 bin/Makefile.am |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/bin/Makefile.am b/bin/Makefile.am
index 2413926..3a58c2c 100644
--- a/bin/Makefile.am
+++ b/bin/Makefile.am
@@ -43,10 +43,14 @@ gegl_tester_SOURCES = \
        gegl-tester.c
 
 if HAVE_MRG
+if HAVE_GEXIV2
+if HAVE_SDL
 gegl_SOURCES += mrg-ui.c
 AM_CFLAGS += $(SDL_CFLAGS)
 AM_LDFLAGS += $(SDL_LIBS)
 endif
+endif
+endif
 
 if HAVE_SPIRO
 gegl_SOURCES += gegl-path-spiro.h gegl-path-spiro.c