patch 7.4.1178

Problem:    empty() doesn't work for the new special variables.
Solution:   Make empty() work. (Damien)

Author: brammool

src/eval.c

@@ -10578,6 +10578,10 @@ f_empty(argvars, rettv)
 	    n = argvars[0].vval.v_dict == NULL
 			|| argvars[0].vval.v_dict->dv_hashtab.ht_used == 0;
 	    break;
+	case VAR_SPECIAL:
+	    n = argvars[0].vval.v_number != VVAL_TRUE;
+	    break;
+
 	default:
 	    EMSG2(_(e_intern2), "f_empty()");
 	    n = 0;

src/testdir/test_viml.vim

@@ -987,6 +987,11 @@ func Test_type()
     call assert_equal(v:true, eval(string(v:true)))
     call assert_equal(v:none, eval(string(v:none)))
     call assert_equal(v:null, eval(string(v:null)))
+
+    call assert_true(empty(v:false))
+    call assert_false(empty(v:true))
+    call assert_true(empty(v:null))
+    call assert_true(empty(v:none))
 endfunc
 
 "-------------------------------------------------------------------------------

src/version.c

@@ -746,6 +746,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1178,
 /**/
     1177,
 /**/