listener: fix buffer overflow loading overlong history line.

* parser.c (lino_getl): Same fixes that were applied two weeks
ago to lino_gets in commit a2a05e3b. Always check for copy and paste!

1 files changed, 1 insertions, 6 deletions

diff --git a/parser.c b/parser.c
index 63796352..3188523d 100644
--- a/parser.c
+++ b/parser.c
@@ -1474,7 +1474,7 @@ static wchar_t *lino_getl(mem_t *stream_in, wchar_t *buf, size_t nchar)
   if (nchar == 0)
     return buf;
 
-  while (nchar > 1) {
+  while (nchar-- > 1) {
     val ch = get_char(stream);
     if (!ch)
       break;
@@ -1482,11 +1482,6 @@ static wchar_t *lino_getl(mem_t *stream_in, wchar_t *buf, size_t nchar)
       break;
   }
 
-  if (ptr == buf) {
-    *ptr++ = 0;
-    return 0;
-  }
-
   *ptr++ = 0;
   return buf;
 }