Buglet fix.

+2001-06-01  Alain Magloire
+
+	* mailbox/mbx_pop.c (pop_writeline): if buffer is NULL noop.
+
 2001-06-01  Sergey Poznyakoff
 2001-06-01  Sergey Poznyakoff
 	* imap4d/search.c: case-insensitive comparison for text fields.
 	* imap4d/search.c: case-insensitive comparison for text fields.
 	  Error checking for stray symbols at the end of criteria.
 	  Error checking for stray symbols at the end of criteria.

@@ -1783,6 +1783,8 @@ pop_writeline (pop_data_t mpd, const char *format, ...)
   va_list ap;
   va_list ap;
   int done = 1;
   int done = 1;
 
 
+  if (mpd->buffer == NULL)
+    return EINVAL;
   va_start(ap, format);
   va_start(ap, format);
   do
   do
     {
     {