(internal_self_insert): Handle weird auto-fill-function.

src/ChangeLog

+2006-02-12  Richard M. Stallman  <rms@gnu.org>
+
+	* cmds.c (internal_self_insert): Handle weird auto-fill-function.
+
 2006-02-11  Eli Zaretskii  <eliz@gnu.org>
 
 	* keyboard.c (Venable_disabled_menus_and_buttons): New variable.

src/cmds.c

@@ -528,7 +528,8 @@ internal_self_insert (c, noautofill)
 	   justification, if any, know where the end is going to be.  */
 	SET_PT_BOTH (PT - 1, PT_BYTE - 1);
       tem = call0 (current_buffer->auto_fill_function);
-      if (c == '\n')
+      /* Test PT < ZV in case the auto-fill-function is strange.  */
+      if (c == '\n' && PT < ZV)
 	SET_PT_BOTH (PT + 1, PT_BYTE + 1);
       if (!NILP (tem))
 	hairy = 2;