patch 9.0.1172: when 'selection' is "exclusive" then "1v" is one char short

Problem:    When 'selection' is "exclusive" then "1v" is one char short.
Solution:   Add one character when 'selection' is "exclusive. (closes #11791)
diff --git a/src/testdir/test_visual.vim b/src/testdir/test_visual.vim
index 573a2cf..df781a0 100644
--- a/src/testdir/test_visual.vim
+++ b/src/testdir/test_visual.vim
@@ -1336,6 +1336,18 @@
   bwipe!
 endfunc
 
+func Test_visual_reselect_exclusive()
+  new
+  call setline(1, ['abcde', 'abcde'])
+  set selection=exclusive
+  normal 1G0viwd
+  normal 2G01vd
+  call assert_equal(['', ''], getline(1, 2))
+
+  set selection&
+  bwipe!
+endfunc
+
 func Test_visual_block_insert_round_off()
   new
   " The number of characters are tuned to fill a 4096 byte allocated block,