Clean up OS checks.

Author: cfis

lib/ruby-bindgen/generators/ffi/library.erb

@@ -14,11 +14,12 @@ def self.search_names
     result << "lib#{name}"
     self.library_versions.each do |version|
       case RbConfig::CONFIG['host_os']
-        when /mswin|msys|mingw|cygwin|bccwin|wince|emc/
-          result << "lib#{name}-#{version}"
-          result << "lib#{name}_#{version}"
         when /darwin|mac os/
           result << "lib#{name}.#{version}"
+        when /mingw/
+          result << "lib#{name}-#{version}"
+        when /mswin/
+          result << "#{name}_#{version}"
         else
           result << "lib#{name}.so.#{version}"
       end