mandoc: Fix the last straggler where the struct roff_node "line" member

mandoc: Fix the last straggler where the struct roff_node "line" member

[schwarze]

Log Message:
-----------
Fix the last straggler where the struct roff_node "line" member 
was abused to detect an input line break; 
instead, use the NODE_LINE flag to improve robustness.

Modified Files:
--------------
    mandoc:
        TODO
        mdoc_validate.c

Revision Data
-------------
Index: mdoc_validate.c
===================================================================
RCS file: /home/cvs/mandoc/mandoc/mdoc_validate.c,v
retrieving revision 1.369
retrieving revision 1.370
diff -Lmdoc_validate.c -Lmdoc_validate.c -u -p -r1.369 -r1.370
--- mdoc_validate.c
+++ mdoc_validate.c
@@ -1581,7 +1581,7 @@ post_it(POST_ARGS)
 			mandoc_msg(MANDOCERR_BL_COL, nit->line, nit->pos,
 			    "%d columns, %d cells", cols, i);
 		else if (nit->head->next->child != NULL &&
-		    nit->head->next->child->line > nit->line)
+		    nit->head->next->child->flags & NODE_LINE)
 			mandoc_msg(MANDOCERR_IT_NOARG,
 			    nit->line, nit->pos, "Bl -column It");
 		break;
Index: TODO
===================================================================
RCS file: /home/cvs/mandoc/mandoc/TODO,v
retrieving revision 1.287
retrieving revision 1.288
diff -LTODO -LTODO -u -p -r1.287 -r1.288
--- TODO
+++ TODO
@@ -523,10 +523,6 @@ are mere guesses, and some may be wrong.
   Found by Aaron M. Ucko in the GNU Hurd via Bdale Garbee,
   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=829624
 
-- We use the input line number at several places to distinguish
-  same-line from different-line input.  That plainly doesn't work
-  with user-defined macros, leading to random breakage.
-
 - Is it possible to further simplify ENDBODY_SPACE?
 
 - Find better ways to prevent endless loops
--
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