Preventing a floating-point exception when the available length

for an answer becomes zero.  The answer will instead wrap to the
next line, which does not look nice but is better than crashing.
Patch by Mahyar Abbaspour.


git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@5235 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

ChangeLog

+2015-05-31  Mahyar Abbaspour  <mahyar.abaspour@gmail.com>
+	* src/prompt.c (get_statusbar_page_start): Prevent a floating-point
+	exception when the available length for an answer becomes zero.
+
 2015-05-28  Benno Schulenberg  <bensberg@justemail.net>
 	* src/help.c (do_help), src/prompt.c (do_yesno_prompt): Normalize
 	the whitespace after the recent changes in logic.

src/prompt.c

@@ -650,7 +650,7 @@ size_t statusbar_xplustabs(void)
  * get_statusbar_page_start(column) < COLS). */
 size_t get_statusbar_page_start(size_t start_col, size_t column)
 {
-    if (column == start_col || column < COLS - 1)
+    if (column == start_col || column < COLS - 1 || COLS == start_col + 1)
 	return 0;
     else
 	return column - start_col - (column - start_col) % (COLS -