updated for version 7.4.511
Problem:    Generating proto for if_ruby.c uses type not defined elsewhere.
Solution:   Do not generate a prototype for
            rb_gc_writebarrier_unprotect_promoted()
diff --git a/src/version.c b/src/version.c
index 89272be..f2b1ca7 100644
--- a/src/version.c
+++ b/src/version.c
@@ -742,6 +742,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    511,
+/**/
     510,
 /**/
     509,