fecdec_filter: Avoid potentially expensive pointer subtraction.

Found by sparse.

diff --git a/fecdec_filter.c b/fecdec_filter.c
index a393a230e436bbacbdd367a6d26032eb20292090..41db249e4ff46ab1eaa829b1e5cf73ea58998f58 100644 (file)
--- a/fecdec_filter.c
+++ b/fecdec_filter.c
@@ -102,7 +102,7 @@ struct private_fecdec_data {
 
 /** Iterate over all fecdec groups. */
 #define FOR_EACH_FECDEC_GROUP(g, d) for (g = (d)->groups; \
-       (g) - (d)->groups < NUM_FEC_GROUPS; (g)++)
+       (g) < (d)->groups + NUM_FEC_GROUPS; (g)++)
 
 static int group_complete(struct fecdec_group *fg)
 {