exp/cmd/godef: fix issue where it would not correctly find the definition of T in struct { *T }
exp/cmd/godef: fix issue where it would not correctly find the definition of T in struct { *T }

tw4452852/godef,grafov/godef,abourget/godef,gonotes/godef,pepin/godef,cmars/tools,cmars/tools,cmars/tools,ManojkumarV/godef,lukehoban/godef,cmars/tools,rogpeppe/godef