curl: Free of uninitialized pointer in doh_decode_rdata_name()

dohdecoderdataname lib/doh.c frees an uninitialized pointer under certain conditions. If the remaining buffer length remaining is bufr; but s-bufr isn't initialized when line 1033 calls it. The bug is that line 1036 should be at the beginning of the function. To illustrate the issue using Visual...