patch 7.4.1181

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

src/version.c

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