commit 890de986ce99079877f3c7202db5e0405309ff60
author Pau Espin Pedrol <pespin@sysmocom.de> Thu Jul 15 14:34:35 2021 +0200
committer Pau Espin Pedrol <pespin@sysmocom.de> Thu Jul 15 14:39:39 2021 +0200
tree 024aef5f2af9d9ed3e8f7b5c92580779aa150a11
parent 4f67a9bf4610c9e948f0d81f3b039f36675180a3

Make gcc 11.1.0 false positivies happy

After my system's gcc was upgraded, I get false positivies like the one
below:
"""
/git/osmo-pcu/src/gprs_bssgp_pcu.c: In function ‘ns_configure_nse’:
/git/osmo-pcu/src/gprs_bssgp_pcu.c:1103:58: error: ‘%d’ directive output may be truncated writing between 1 and 11 bytes into a region of size 2 [-Werror=format-truncation=]
 1103 |                         snprintf(name, sizeof(name), "pcu%d", i);
      |                                                          ^~
/git/osmo-pcu/src/gprs_bssgp_pcu.c:1103:54: note: directive argument in the range [-2147483648, 1]
 1103 |                         snprintf(name, sizeof(name), "pcu%d", i);
      |                                                      ^~~~~~~
/git/osmo-pcu/src/gprs_bssgp_pcu.c:1103:25: note: ‘snprintf’ output between 5 and 15 bytes into a destination of size 5
 1103 |                         snprintf(name, sizeof(name), "pcu%d", i);
      |                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
"""
In this case, i can't never take a value with more than 1 digit, but gcc
seems to be unable to see that.

Let's increase the buffer size a few bytes to make gcc happy, and make
the variable unsigned since it never will get negative values.

Next change is also a false positive, since variables are always
initialized beforehand in the cod epaths where they are used:
"""
/git/osmo-pcu/src/bts.cpp: In function ‘int bts_rcv_rach(gprs_rlcmac_bts*, const rach_ind_params*)’:
/git/osmo-pcu/src/bts.cpp:859:25: error: ‘ts_no’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
  859 |         uint8_t trx_no, ts_no;
      |                         ^~~~~
/git/osmo-pcu/src/bts.cpp:859:17: error: ‘trx_no’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
  859 |         uint8_t trx_no, ts_no;
      |                 ^~~~~~
"""

Change-Id: I1362a335a0c761bde367dbc779de4afa88f13584