unicode flag for 1.9 Regexp is being ignored, so let's not set it.

lib/thinking_sphinx/search.rb

@@ -612,7 +612,7 @@ def star_query(query)
     end
 
     if Regexp.instance_methods.include?(:encoding)
-      DefaultStarToken = Regexp.new('\p{Word}+', nil, 'u')
+      DefaultStarToken = Regexp.new('\p{Word}+')
     else
       DefaultStarToken = Regexp.new('\w+', nil, 'u')
     end