patch 9.0.0936: wrong type for "isunnamed" returned by getreginfo()

Problem:    Wrong type for "isunnamed" returned by getreginfo().
Solution:   Use VAR_BOOL instead of VAR_SPECIAL. (closes #11598)

src/evalfunc.c

@@ -8415,7 +8415,7 @@ f_getreginfo(typval_T *argvars, typval_T *rettv)
 
 	if (item != NULL)
 	{
-	    item->di_tv.v_type = VAR_SPECIAL;
+	    item->di_tv.v_type = VAR_BOOL;
 	    item->di_tv.vval.v_number = regname == buf[0]
 						      ? VVAL_TRUE : VVAL_FALSE;
 	    (void)dict_add(dict, item);

src/testdir/test_registers.vim

@@ -520,6 +520,13 @@ func Test_get_reginfo()
   nunmap <F2>
   unlet g:RegInfo
 
+  " The type of "isunnamed" was VAR_SPECIAL but should be VAR_BOOL.  Can only
+  " be noticed when using json_encod().
+  call setreg('a', 'foo')
+  let reginfo = getreginfo('a')
+  let expected = #{regcontents: ['foo'], isunnamed: v:false, regtype: 'v'}
+  call assert_equal(json_encode(expected), json_encode(reginfo))
+
   bwipe!
 endfunc
 

src/version.c

@@ -695,6 +695,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    936,
 /**/
     935,
 /**/