Added execute permitions to node-gyp and fixed a minro bug passing an empty expat_root variable to compile with gyp
Added execute permitions to node-gyp and fixed a minro bug passing an empty expat_root variable to compile with gyp

node-xmpp/node-expat,Moharu/node-expat,julianduque/node-expat,noahjs/node-expat,julianduque/node-expat,noahjs/node-expat,Moharu/node-expat,julianduque/node-expat,Moharu/node-expat,node-xmpp/node-expat,node-xmpp/node-expat,noahjs/node-expat