patch 8.0.0483: illegal memory access when using :all

Problem:    Illegal memory access when using :all. (Dominique Pelle)
Solution:   Adjust the cursor position right after setting "curwin".

Author: brammool

src/testdir/test_window_cmd.vim

@@ -67,4 +67,16 @@ function Test_window_cmd_wincmd_gf()
   augroup! test_window_cmd_wincmd_gf
 endfunc
 
+func Test_next_split_all()
+  " This was causing an illegal memory access.
+  n x
+  norm axxx
+  split
+  split
+  s/x
+  s/x
+  all
+  bwipe!
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab

src/version.c

@@ -764,6 +764,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    483,
 /**/
     482,
 /**/

src/window.c

@@ -2450,6 +2450,10 @@ win_close(win_T *win, int free_buf)
 #endif
 	curbuf = curwin->w_buffer;
 	close_curwin = TRUE;
+
+	/* The cursor position may be invalid if the buffer changed after last
+	 * using the window. */
+	check_cursor();
     }
     if (p_ea && (*p_ead == 'b' || *p_ead == dir))
 	win_equal(curwin, TRUE, dir);