[fpc-devel] [patch] fixes check for unused threadvars

[Sergei Gorelkin]

Hello,

Attached is a one-line fix that makes programs a couple of bytes smaller 
by preventing creation of empty threadvar tables when threadvars are not 
actually used.
The condition "Assigned(TAsmList.First)" always evaluates to True 
because the list contains at least one marker item.

Regards,
Sergei
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