Otherwise we get (valid!) format string warnings like these on 32bit
targets:
[ 372s] bssmap_le/bssmap_le_test.c: In function 'test_bssmap_le_enc_dec':
[ 372s] bssmap_le/bssmap_le_test.c:141:15: warning: format '%ld' expects argument of type 'long int', but argument 2 has type 'int' [-Wformat=]
[ 372s] printf("[%ld] %s: ERROR: failed to encode pdu\n", (pdu - bssmap_le_test_pdus),
[ 372s] ^
Closes: OS#4786
Change-Id: Ib1c16b8adc5c8c0a2b418db51d12089f9b49a844