patch 9.0.0255: build failure without the eval feature

Problem:    Build failure without the eval feature.
Solution:   Add #ifdef.
diff --git a/src/scriptfile.c b/src/scriptfile.c
index 48e475b..bb30756 100644
--- a/src/scriptfile.c
+++ b/src/scriptfile.c
@@ -1775,6 +1775,7 @@
 	apply_autocmds(EVENT_SOURCEPOST, fname_exp, fname_exp, FALSE, curbuf);
 
 theend:
+#ifdef FEAT_EVAL
     if (sid > 0 && ret_sid != NULL
 	    && fname_not_fixed != NULL && fname_exp != NULL)
     {
@@ -1786,6 +1787,7 @@
 	if (SCRIPT_ID_VALID(not_fixed_sid) && not_fixed_sid != sid)
 	    SCRIPT_ITEM(not_fixed_sid)->sn_sourced_sid = sid;
     }
+#endif
 
     vim_free(fname_not_fixed);
     vim_free(fname_exp);