patch 7.4.1181

Problem:    free_tv() can't handle special variables. (Damien)
Solution:   Add the variable type.

Author: brammool

src/eval.c

@@ -21608,6 +21608,7 @@ free_tv(varp)
 	    case VAR_FLOAT:
 #endif
 	    case VAR_UNKNOWN:
+	    case VAR_SPECIAL:
 		break;
 	    default:
 		EMSG2(_(e_intern2), "free_tv()");

src/testdir/test_viml.vim

@@ -1005,6 +1005,16 @@ func Test_type()
     call assert_false(empty(v:true))
     call assert_true(empty(v:null))
     call assert_true(empty(v:none))
+
+    func ChangeYourMind()
+      try
+	return v:true
+      finally
+        return 'something else'
+      endtry
+    endfunc
+
+    call ChangeYourMind()
 endfunc
 
 "-------------------------------------------------------------------------------

src/version.c

@@ -746,6 +746,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1181,
 /**/
     1180,
 /**/