vim-patch:8.0.0256: missing changes to one file breaks test

Problem:    Tests fail because some changes were not included.
Solution:   Add changes to evalfunc.c
3a29abcb61

src/nvim/eval.c

@@ -14806,8 +14806,7 @@ static void f_setpos(typval_T *argvars, typval_T *rettv, FunPtr fptr)
         pos.col = 0;
       }
       if (name[0] == '.' && name[1] == NUL) {
-        // set cursor
-        if (fnum == curbuf->b_fnum) {
+        // set cursor; "fnum" is ignored
         curwin->w_cursor = pos;
         if (curswant >= 0) {
           curwin->w_curswant = curswant - 1;
@@ -14815,9 +14814,6 @@ static void f_setpos(typval_T *argvars, typval_T *rettv, FunPtr fptr)
         }
         check_cursor();
         rettv->vval.v_number = 0;
-        } else {
-          EMSG(_(e_invarg));
-        }
       } else if (name[0] == '\'' && name[1] != NUL && name[2] == NUL)   {
         // set mark
         if (setmark_pos((uint8_t)name[1], &pos, fnum) == OK) {

test/functional/eval/setpos_spec.lua

@@ -27,9 +27,8 @@ describe('setpos() function', function()
     eq(getpos("."), {0, 2, 1, 0})
     setpos(".", {2, 1, 1, 0})
     eq(getpos("."), {0, 1, 1, 0})
-    -- Ensure get an error attempting to set position to another buffer
     local ret = exc_exec('call setpos(".", [1, 1, 1, 0])')
-    eq('Vim(call):E474: Invalid argument', ret)
+    eq(0, ret)
   end)
   it('can set lowercase marks in the current buffer', function()
     setpos("'d", {0, 2, 1, 0})