Log a warning instead of an error when unpacking a QWK REP packet which

contains a message hdr with a block length less than 2. Some versions of
Mystic apparently generate these REP packets and the errors are annoying
and there's really nothing the sysop can do about it but report back to
the user (or QWKnet node) that their packets contained some invalid
message headers.

src/sbbs3/un_rep.cpp

@@ -199,10 +199,9 @@ bool sbbs_t::unpack_rep(char* repfile)
 					errors++;
 				continue;
 			}
-			snprintf(str, sizeof(str)-1
-				, "%s blocks (read '%c' at offset %ld, '%s' at offset %ld)"
-				, msg_fname, block[0], l, tmp, l + 116);
-			errormsg(WHERE, ERR_CHK, tmp, blocks, str);
+			lprintf(LOG_WARNING
+				, "%s msg blocks less than 2 (read '%c' at offset %ld, '%s' at offset %ld)"
+				, getfname(msg_fname), block[0], l, tmp, l + 116);
 			errors++;
 			blocks=1;
 			continue;