Possible uninitialized buffer?

Hello. I saw it [here](https://github.com/ntwk/bdfresize/blob/4d94e4d2c415f38f9095d80f7b0892891705dcf6/bdfresize.c#L452), shouldn't **buf[]** be initialized (at least, _buf[0]_ zeroed) before **strcat**()? Possible solution also, replace that **strcat**() by **strcpy**()?