updated for version 7.2.441

Problem:    When using ":earlier" undo information may be wrong.
Solution:   When changing alternate branches also adjust b_u_oldhead.

src/undo.c

@@ -242,7 +242,7 @@ u_save(top, bot)
 }
 
 /*
- * save the line "lnum" (used by ":s" and "~" command)
+ * Save the line "lnum" (used by ":s" and "~" command).
  * The line is replaced, so the new bottom line is lnum + 1.
  */
     int
@@ -256,7 +256,7 @@ u_savesub(lnum)
 }
 
 /*
- * a new line is inserted before line "lnum" (used by :s command)
+ * A new line is inserted before line "lnum" (used by :s command).
  * The line is inserted, so the new bottom line is lnum + 1.
  */
     int
@@ -270,7 +270,7 @@ u_inssub(lnum)
 }
 
 /*
- * save the lines "lnum" - "lnum" + nlines (used by delete command)
+ * Save the lines "lnum" - "lnum" + nlines (used by delete command).
  * The lines are deleted, so the new bottom line is lnum, unless the buffer
  * becomes empty.
  */
@@ -996,6 +996,8 @@ undo_time(step, sec, absolute)
 		last->uh_alt_next = uhp;
 		uhp->uh_alt_prev = last;
 
+		if (curbuf->b_u_oldhead == uhp)
+		    curbuf->b_u_oldhead = last;
 		uhp = last;
 		if (uhp->uh_next != NULL)
 		    uhp->uh_next->uh_prev = uhp;
@@ -1406,10 +1408,9 @@ u_sync(force)
 /*
  * ":undolist": List the leafs of the undo tree
  */
-/*ARGSUSED*/
     void
 ex_undolist(eap)
-    exarg_T *eap;
+    exarg_T *eap UNUSED;
 {
     garray_T	ga;
     u_header_T	*uhp;
@@ -1529,10 +1530,9 @@ u_add_time(buf, buflen, tt)
 /*
  * ":undojoin": continue adding to the last entry list
  */
-/*ARGSUSED*/
     void
 ex_undojoin(eap)
-    exarg_T *eap;
+    exarg_T *eap UNUSED;
 {
     if (curbuf->b_u_newhead == NULL)
 	return;		    /* nothing changed before */

src/version.c

@@ -681,6 +681,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    441,
 /**/
     440,
 /**/