typo

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@2296 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

io.c

@@ -1337,7 +1337,7 @@ rb_io_sysseek(argc, argv, io)
 
     GetOpenFile(io, fptr);
     if ((fptr->mode & FMODE_READABLE) && READ_DATA_PENDING(fptr->f)) {
-	rb_raise(rb_eIOError, "syseek for buffered IO");
+	rb_raise(rb_eIOError, "sysseek for buffered IO");
     }
     if ((fptr->mode & FMODE_WRITABLE) && (fptr->mode & FMODE_WBUF)) {
 	rb_warn("sysseek for buffered IO");