[babl] babl: fix building reference-fish without lcms2

[Øyvind "pippin" Kolås <ok src gnome org>]

commit ef3a134996a430b01adbc9029223e5a2c7486d25
Author: Øyvind Kolås <pippin gimp org>
Date:   Thu Dec 6 22:34:34 2018 +0100

    babl: fix building reference-fish without lcms2

 babl/babl-fish-reference.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)
---
diff --git a/babl/babl-fish-reference.c b/babl/babl-fish-reference.c
index 6ef1c69..81aa9b2 100644
--- a/babl/babl-fish-reference.c
+++ b/babl/babl-fish-reference.c
@@ -1017,9 +1017,12 @@ babl_fish_reference_process_double (const Babl *babl,
  else if (source_kind      == KIND_CMYK &&
           destination_kind == KIND_CMYK)
  {
-    if (source_space != destination_space &&
-        source_space->space.cmyk.lcms_profile &&
-        destination_space->space.cmyk.lcms_profile)
+    if (source_space != destination_space
+#if HAVE_LCMS
+        && source_space->space.cmyk.lcms_profile
+        && destination_space->space.cmyk.lcms_profile
+#endif
+ )
     {
 #if HAVE_LCMS