patch 7.4.1645

Problem:    When a dict contains a partial it can't be redefined as a
            function. (Nikolai Pavlov)
Solution:   Remove the partial when overwriting with a function.

Author: brammool

src/eval.c

@@ -23455,7 +23455,8 @@ ex_function(exarg_T *eap)
 	else
 	    arg = fudi.fd_newkey;
 	if (arg != NULL && (fudi.fd_di == NULL
-				     || fudi.fd_di->di_tv.v_type != VAR_FUNC))
+				     || (fudi.fd_di->di_tv.v_type != VAR_FUNC
+				 && fudi.fd_di->di_tv.v_type != VAR_PARTIAL)))
 	{
 	    if (*arg == K_SPECIAL)
 		j = 3;

src/testdir/test_partial.vim

@@ -193,3 +193,16 @@ func Test_tostring()
     call assert_true(v:false, v:exception)
   endtry
 endfunc
+
+func Test_redefine_dict_func()
+  let d = {}
+  function d.test4()
+  endfunction
+  let d.test4 = d.test4
+  try
+    function! d.test4(name)
+    endfunction
+  catch
+    call assert_true(v:errmsg, v:exception)
+  endtry
+endfunc

src/version.c

@@ -748,6 +748,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1645,
 /**/
     1644,
 /**/