patch 8.1.0436: can get the text of inputsecret() with getcmdline()

Problem:    Can get the text of inputsecret() with getcmdline(). (Tommy Allen)
Solution:   Don't return the text.

src/version.c

@@ -794,6 +794,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    436,
 /**/
     435,
 /**/