updated for version 7.3.146

Problem:    It's possible to assign to a read-only member of a dict.
            It's possible to create a global variable "0". (ZyX)
            It's possible to add a v: variable with ":let v:.name = 1".
Solution:   Add check for dict item being read-only.
            Check the name of g: variables.
            Disallow adding v: variables.

src/version.c

@@ -714,6 +714,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    146,
 /**/
     145,
 /**/