win32/file.c: use ALLOC_N
win32/file.c (rb_file_expand_path_internal): ditto.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@56008 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
win32/file.c: use ALLOC_N
instead of casted xmalloc with multiplication.
win32/file.c (rb_file_expand_path_internal): ditto.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@56008 b2dd03c8-39d4-4d8f-98ff-823fe69b080e