patch 8.0.0339: illegal memory access with vi'

Problem:    Illegal memory access with vi'
Solution:   For quoted text objects bail out if the Visual area spans more
            than one line.
diff --git a/src/testdir/test_visual.vim b/src/testdir/test_visual.vim
index 9d093d3..227da87 100644
--- a/src/testdir/test_visual.vim
+++ b/src/testdir/test_visual.vim
@@ -43,3 +43,10 @@
   normal vapo
   bwipe!
 endfunc
+
+func Test_Visual_inner_quote()
+  new
+  normal oxX
+  normal vki'
+  bwipe!
+endfunc