Fix typo introduced Jul 14 2015
Fix typo introduced Jul 14 2015

Just noticed this while looking at the code.

Verified that https://www.w3.org/TR/2002/REC-xmldsig-core-20020212/xmldsig-core-schema.xsd#dsa-sha1 is correct and https://www.w3.org/TR/2002/REC-xmldsig-core-20020212/xmld/sig-core-schema.xsd#dsa-sha1 goes to a 404 page
onelogin/php-saml,sproogen/php-saml,stayallive/php-saml,Ricky-rick/php-saml