[fpc-devel] [patch] Trivial fix to exeinfo unit

[Sergei Gorelkin]

Hello,

(As a side effect of digging into issue #13237):

When OpenExeFile is called with an empty filename argument, it 
apparently opens stdin and crashes immediately thereafter trying to seek 
in non-seekable stream.
The filename is empty whenever GetLineInfo is called with the address 
that does not belong to valid module.
The attached patch fixes the crash.

Regards,
Sergei
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