Fix crash in CHM output if a document has no title.

Naturally, after calling the previous commit '1.2', someone had to
instantly find a bug that shows up in the simplest possible example
Halibut invocation :-(

1 files changed, 6 insertions, 4 deletions

diff --git a/bk_html.c b/bk_html.c
index 784e3ca..f6b7f4b 100644
--- a/bk_html.c
+++ b/bk_html.c
@@ -1887,8 +1887,9 @@ static void html_backend_common(paragraph *sourceform, keywordlist *keywords,
             ho_setup_rdstringc(&ho, &rs);
 
             ho.hacklimit = 255;
-            html_words(&ho, topsect->title->words, NOTHING,
-                       NULL, keywords, &conf);
+            if (topsect->title)
+                html_words(&ho, topsect->title->words, NOTHING,
+                           NULL, keywords, &conf);
 
             rdaddc(&rs, '\0');
             chm_title(chm, rs.text);
@@ -2027,8 +2028,9 @@ static void html_backend_common(paragraph *sourceform, keywordlist *keywords,
                   "Title=");
 
 	ho.hacklimit = 255;
-	html_words(&ho, topsect->title->words, NOTHING,
-		   NULL, keywords, &conf);
+        if (topsect->title)
+            html_words(&ho, topsect->title->words, NOTHING,
+                       NULL, keywords, &conf);
 
 	ho_string(&ho, "\n");