goruby_options: do not goto into a branch

I'm not necessarily against every goto in general, but jumping into a
branch is definitely a bad idea.  Better refactor.

goruby.c

@@ -49,10 +49,8 @@ goruby_options(int argc, char **argv)
 	close(infd);
 	return ret;
     }
-    else {
-      no_irb:
-	return ruby_options(argc, argv);
-    }
+  no_irb:
+    return ruby_options(argc, argv);
 }
 
 int