Allow ARFCN 0 to be used in GSM900 band.

Signed-off-by: Michael McTernan mike.mcternan@wavemobile.com Index: osmobss/openbsc/openbsc/src/libbsc/bsc_init.c =================================================================== --- osmobss.orig/openbsc/openbsc/src/libbsc/bsc_init.c 2015-06-03 11:36:16.114471430 +0100 +++ osmobss/openbsc/openbsc/src/libbsc/bsc_init.c 2015-06-18 08:53:14.116369178 +0100 @@ -379,10 +379,10 @@ static int bootstrap_bts(struct gsm_bts } break; case GSM_BAND_900: - if (bts->c0->arfcn < 1 || + if (bts->c0->arfcn < 0 || (bts->c0->arfcn > 124 && bts->c0->arfcn < 955) || bts->c0->arfcn > 1023) { - LOGP(DNM, LOGL_ERROR, "GSM900 channel must be between 1-124, 955-1023.\n"); + LOGP(DNM, LOGL_ERROR, "GSM900 channel must be between 0-124, 955-1023.\n"); return -EINVAL; } break;