TTextLogAppender is not thread safe

[Honza Rameš]

TTextLogAppender implementation is not thread safe even if ErrOutput is used solely by the logging framework.

Note that if someone else is using ErrOutput this cannot be thread-safe by design.

[Honza Rameš]

added thread lock to TTextLogAppender (fixes #235)

→ <<cset 3fa29a2a5e56>>

[Cesar Romero]

Line 256 "fLock,Free"

Shouldn't it be fLock.Leave? fLock.Free will Destroy the fLock instance.

[Ryan Potts]

@cesarliws I concur, it appears to me that one should .leave or .release the lock when finished, not .free it.

[Honza Rameš]

added thread lock to TTextLogAppender (fixes #235)

→ <<cset 31ca73cab65b>>

[Honza Rameš]

Thanks guys just a typo. Fixed, please rebase your repos carefully.

[Ryan Potts]

Thanks for the quick fix.