filter out empty nodes from statement list

+ Fixes tail call analysis that was accidentally broken by
  64146b46da45ce69ab380add00459f7b60fe9196

+ Kind of wasteful to first allocate empty node and then just throw it
  away, but I don't have any better ideas at the moment

1 files changed, 1 insertions, 0 deletions

diff --git a/include/fwd/ast.h b/include/fwd/ast.h
index 1d784f1..f550647 100644
--- a/include/fwd/ast.h
+++ b/include/fwd/ast.h
@@ -699,6 +699,7 @@ int equiv_node_lists(struct ast *c1, struct ast *c2);
 struct ast *reverse_ast_list(struct ast *root);
 struct type *reverse_type_list(struct type *root);
 
+struct ast *filter_empty(struct ast *root);
 void fix_closures(struct ast *root);
 
 #define foreach_node(iter, nodes) \