NULL check needs to be moved before using strchr #4115
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The new block checking `ecdh_curve` values was introduced before the existing check on whether `ecdh_curve` was NULL. Having `ecdh_curve` NULL is at least possible from trustrouter.c, where a new `fr_tls_server_conf_t` struct is created and initialised to 0. This resulted in SIGSEGVs when using the trustrouter module.
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The new block checking
ecdh_curvevalues was introduced before the existing check on whetherecdh_curvewas NULL.Having
ecdh_curveNULL is at least possible from trustrouter.c, where a newfr_tls_server_conf_tstruct is created and initialised to 0.This resulted in SIGSEGVs when using the trustrouter module.