babl_space_get_icc: permit passing NULL for return length

diff --git a/babl/babl-icc.c b/babl/babl-icc.c
index f463e9e190fb2b4444c031eb2ba7b42a7a46a224..1ffe41580e15ebfc781cc55405ffe5dbea9c792b 100644 (file)
--- a/babl/babl-icc.c
+++ b/babl/babl-icc.c
@@ -626,7 +626,7 @@ const char *babl_space_get_icc (const Babl *babl, int *length)
                               "babl profile", NULL, 0,
                               &babl_noconst->space.icc_length);
   }
-  *length = babl->space.icc_length;
+  if (length) *length = babl->space.icc_length;
   return babl->space.icc_profile;
 }