[Freeassociation-devel] icaltimezone_load_builtin_timezone() deadlock with pthread support enabled

[Milan Crha]

	Hi,
when libical is built with pthread support and there is missing or
otherwise broken one zone file, then the
icaltimezone_load_builtin_timezone() deadlocks, unless the
missing/broken zone is the last in the zone.tab file. Then it'll
deadlock the next time the icaltimezone_load_builtin_timezone() is
called.

The attached patch fixes the issue.
	Bye,
	Milan

P.S.: This was reported on #evolution's IRC by one user
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