Fix detection of sha224 and sha384, patch from Brian Sipos

https://sourceforge.net/p/net-snmp/bugs/2564/

Luckily nobody's needed to build using an OpenSSL version
that doesn't support sha224 or sha384, since the inversion
of the test here would try to use sha224/sha384 support only
on OpenSSL versions that don't support them!
2 files changed