Fix Autoconf testing for incorrect netmask member variable (pashev.igor).
Fix Autoconf testing for incorrect netmask member variable (pashev.igor).

jdelgadoalfonso/openpgm,jdelgadoalfonso/openpgm,jdelgadoalfonso/openpgm,jdelgadoalfonso/openpgm,jdelgadoalfonso/openpgm,jdelgadoalfonso/openpgm