binding.rb in fast_excel-0.4.0

- old
+ new

@@ -5,9 +5,11 @@
 module Libxlsxwriter
   extend FFI::Library
 
   LIB_FILENAME = if RUBY_PLATFORM =~ /darwin/
     "libxlsxwriter.dylib"
+  elsif ['x64-mingw32', 'i386-mingw32'].include? RUBY_PLATFORM
+    "libxlsxwriter.dll"
   else
     "libxlsxwriter.so"
   end
 
   ffi_lib File.expand_path("./../../../libxlsxwriter/lib/#{LIB_FILENAME}", __FILE__)