Zero-init 'msg' before use

CID 350279

src/sbbs3/smbutil.c

@@ -502,6 +502,7 @@ void listmsgs(ulong start, ulong count)
 	if(!count)
 		count=~0;
 	while(l<count) {
+		ZERO_VAR(msg);
 		fseek(smb.sid_fp,((start-1L) + l)*idxreclen,SEEK_SET);
 		if(!fread(&msg.idx,sizeof(msg.idx),1,smb.sid_fp))
 			break;