[PATCH] Fix issue with AT parser in gatserver

This patch fix an issue with AT parser in gatserver. If an empty command is issued after AT, then 2 answers are sent. The parser can also get in a bad state where next commands will not be handled. After that the parser will get back on his feets. This is caused by reentrency: new_bytes() calls g_at_server_send_final(), which in turns calls server_resume which calls new_bytes() again synchronously. Sample dialog follows: ofonod[30720]: Server: < AT+CMER=3,0,0,1\r\n ofonod[30720]: Server: > \r\nOK\r\n ofonod[30720]: Server: < AT+CFUN\r\n ofonod[30720]: Server: > \r\nERROR\r\n ofonod[30720]: Server: < AT\r\n ofonod[30720]: Server: > \r\nOK\r\n ofonod[30720]: Server: < \r\n ofonod[30720]: Server: > \r\nOK\r\n\r\nOK\r\n <2 answers sent> ofonod[30720]: Server: < AT+CFUN\r\n ofonod[30720]: Server: > \r\nERROR\r\n ofonod[30720]: Server: < \r\n ofonod[30720]: Server: > \r\nOK\r\n ofonod[30720]: Server: < AT+CFUN\r\n <missing ERROR reply to CFUN> ofonod[30720]: Server: < \r\n ofonod[30720]: Server: > \r\nOK\r\n Frédéric Dalleau (1): gatchat: Fix reentrency issue with empty commands gatchat/gatserver.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-)