TFTP: re-indented the source code

Just made sure that the good old curl indentation style is used all over
this file.

lib/tftp.c

@@ -755,9 +755,9 @@ static CURLcode tftp_tx(tftp_state_data_t *state, tftp_event_t event)
       time(&state->rx_time);
       state->block++;
     }
-    else {
+    else
       state->block = 1; /* first data block is 1 when using OACK */
-    }
+
     state->retries = 0;
     setpacketevent(&state->spacket, TFTP_EVENT_DATA);
     setpacketblock(&state->spacket, state->block);