add DB's similar simplification of do_prev_word() too

git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@1693 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

ChangeLog

@@ -69,6 +69,8 @@ CVS code -
   do_next_word()
 	- Simplify and remove references to editbot so as to avoid a
 	  segfault. (David Benbennick)
+  do_prev_word()
+	- Simplify and remove references to edittop. (David Benbennick)
   do_int_speller(), do_alt_speller(), do_spell()
 	- Modify to write only the current selection from a file to the
 	  temporary file used for spell checking when the mark is on,

src/nano.c

@@ -1205,8 +1205,6 @@ int do_next_word(void)
 /* The same thing for backwards. */
 int do_prev_word(void)
 {
-    filestruct *old = current;
-
     assert(current != NULL && current->data != NULL);
 
     /* Skip letters in this word first. */
@@ -1234,31 +1232,10 @@ int do_prev_word(void)
 
     placewewant = xplustabs();
 
-    if (current->lineno <= edittop->lineno) {
-	/* If we're on the first line, don't center the screen. */
-	if (current->lineno == fileage->lineno)
-	    edit_refresh();
-	else
-	    edit_update(current, CENTER);
-    }
-    else {
-	/* If we've jumped lines, refresh the old line.  We can't just
-	   use current->prev here, because we may have skipped over some
-	   blank lines, in which case the previous line is the wrong
-	   one. */
-	if (current != old) {
-	    update_line(old, 0);
-	    /* If the mark was set, then the lines between old and
-	       current have to be updated too. */
-	    if (ISSET(MARK_ISSET)) {
-		while (old->prev != current) {
-		    old = old->prev;
-		    update_line(old, 0);
-		}
-	    }
-	}
-	update_line(current, current_x);
-    }
+    /* Refresh the screen.  If current has run off the top, this call
+     * puts it at the center line. */
+    edit_refresh();
+
     return 0;
 }
 #endif /* !NANO_SMALL */