Task #131758 - fixed.err

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Error: CPPCHECK_WARNING (CWE-476):
libsepol-3.10/src/services.c:803: warning[nullPointer]: Possible null pointer dereference: p
#  801|   			while (1) {
#  802|   				p = *r_buf ? (*r_buf + reason_buf_used) : NULL;
#  803|-> 				len = snprintf(p, reason_buf_len - reason_buf_used,
#  804|   						"%s", buffers[x]);
#  805|   				if (len < 0 || len >= reason_buf_len - reason_buf_used) {