GUB fail in mingw build - Issue 4462

[Phil Holmes]

I'm getting a failure to build GUB, as shown below:

/home/gub/NewGub/gub/target/mingw/src/lilypond-git.sv.gnu.org--lilypond.git-
release-unstable/lily/lily-modules.cc: In member function 'void 
Scm_module::import()':
/home/gub/NewGub/gub/target/mingw/src/lilypond-git.sv.gnu.org--lilypond.git-
release-unstable/lily/lily-modules.cc:71:7: error: expected primary-
expression before 'struct'
   SCM interface = scm_c_resolve_module (name_);
       ^
/home/gub/NewGub/gub/target/mingw/src/lilypond-git.sv.gnu.org--lilypond.git-
release-unstable/lily/lily-modules.cc:76:5: error: expected primary-
expression before 'struct'
     interface = Guile_user::module_public_interface (interface);
     ^
/home/gub/NewGub/gub/target/mingw/src/lilypond-git.sv.gnu.org--lilypond.git-
release-unstable/lily/lily-modules.cc:80:24: error: expected primary-
expression before 'struct'
       p->var_->import (interface, p->name_);
                        ^
/home/gub/NewGub/gub/target/mingw/src/lilypond-git.sv.gnu.org--lilypond.git-
release-unstable/lily/lily-modules.cc:85:13: error: expected primary-
expression before 'struct'
   module_ = interface;
             ^
make[1]: *** [out/lily-modules.o] Error 1

Looks like this comes from Issue 4462: perhaps 'interface' is a reserved
word for the Windows compiler?