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.

src/search.c

@@ -4357,6 +4357,10 @@ current_quote(
     /* Correct cursor when 'selection' is exclusive */
     if (VIsual_active)
     {
+	/* this only works within one line */
+	if (VIsual.lnum != curwin->w_cursor.lnum)
+	    return FALSE;
+
 	vis_bef_curs = lt(VIsual, curwin->w_cursor);
 	if (*p_sel == 'e' && vis_bef_curs)
 	    dec_cursor();

src/testdir/test_visual.vim

@@ -43,3 +43,10 @@ func Test_Visual_vapo()
   normal vapo
   bwipe!
 endfunc
+
+func Test_Visual_inner_quote()
+  new
+  normal oxX
+  normal vki'
+  bwipe!
+endfunc

src/version.c

@@ -764,6 +764,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    339,
 /**/
     338,
 /**/