The amount to scroll is never zero, so there is no need to check.

git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@5660 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

ChangeLog

@@ -1,6 +1,7 @@
 2016-02-22  Benno Schulenberg  <bensberg@justemail.net>
 	* src/nano.c (free_openfilestruct): Elide this function.
 	* scr/global.c (thanks_for_all_the_fish, free_list_item): Condense.
+	* src/winio.c (edit_scroll): The amount to scroll is never zero.
 
 2016-02-21  Benno Schulenberg  <bensberg@justemail.net>
 	* src/files.c (input_tab): If the first Tab added the part that all

src/winio.c

@@ -2848,9 +2848,7 @@ void edit_scroll(scroll_dir direction, ssize_t nlines)
     filestruct *foo;
     bool do_redraw = need_screen_update(0);
 
-    /* Don't bother scrolling less than one line. */
-    if (nlines < 1)
-	return;
+    assert(nlines > 0);
 
     /* Part 1: nlines is the number of lines we're going to scroll the
      * text of the edit window. */