patch 9.0.1192: no error when class function argument shadows a member

Problem:    No error when class function argument shadows a member.
Solution:   Check for shadowing.

src/version.c

@@ -695,6 +695,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1192,
 /**/
     1191,
 /**/