ruby.c: unnecessary variable

* ruby.c (open_load_file): remove unnecessary nested local
  variable.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52155 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ruby.c

@@ -1803,7 +1803,7 @@ open_load_file(VALUE fname_v, int *xflag)
 	}
 #endif
 	if (!ruby_is_fd_loadable(fd)) {
-	    int e = errno;
+	    e = errno;
 	    (void)close(fd);
 	    rb_load_fail(fname_v, strerror(e));
 	}