readline.c: fix waiting fucntion

* ext/readline/readline.c (getc_body): use
  rb_w32_wait_events_blocking in block region.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57787 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ext/readline/readline.c

@@ -182,7 +182,7 @@ getc_body(struct getc_struct *p)
                         ReadConsoleInput(h, &ir, 1, &n);
                     }
                 } else {
-                    rb_w32_wait_events(&h, 1, INFINITE);
+                    rb_w32_wait_events_blocking(&h, 1, INFINITE);
                 }
             } else {
                 break;