yin parser BUGFIX copy-paste erro in processing if-features in refine
diff --git a/src/parser_yin.c b/src/parser_yin.c
index b9ecacb..1ab81bc 100644
--- a/src/parser_yin.c
+++ b/src/parser_yin.c
@@ -2599,7 +2599,7 @@
         }
     }
     if (c_ftrs) {
-        rfn->iffeature = calloc(c_must, sizeof *rfn->iffeature);
+        rfn->iffeature = calloc(c_ftrs, sizeof *rfn->iffeature);
         if (!rfn->iffeature) {
             LOGMEM;
             goto error;