Cleanup post_bl_head() to use enum mdoc_list (avoid traversing that

list).

Reverted MANDOC_COLUMNS to be a bad-bad syntax error: we don't, and
apparently never have, allowed mixing of -column syntaxes.  This would
have segfaulted if encountered.

1 files changed, 2 insertions, 0 deletions

diff --git a/TODO b/TODO
index 526b5366..b1ba9ef5 100644
--- a/TODO
+++ b/TODO
@@ -59,6 +59,8 @@
   flags defined for struct mdoc_macro
 
 - set a meaningful default if no `Bl' list type is assigned
+
+- have a blank `It' head for `Bl -tag' not puke
   
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 * formatting issues: ugly output