patch 8.2.0265: "eval" after "if 0" doesn't check for following command

Problem:    "eval" after "if 0" doesn't check for following command.
Solution:   Add "eval" to list of commands that check for a following command.
            (closes #5640)
diff --git a/src/testdir/test_expr.vim b/src/testdir/test_expr.vim
index bd9caca..1281ae7 100644
--- a/src/testdir/test_expr.vim
+++ b/src/testdir/test_expr.vim
@@ -530,3 +530,12 @@
   call assert_equal(2, str2nr('2a'))
   call assert_fails('inoremap <Char-0b1z> b', 'E474:')
 endfunc
+
+func Test_eval_after_if()
+  let s:val = ''
+  func SetVal(x)
+    let s:val ..= a:x
+  endfunc
+  if 0 | eval SetVal('a') | endif | call SetVal('b')
+  call assert_equal('b', s:val)
+endfunc