Account for the possibility of a nil options argument to CompressedMe…

…mCacheStore#read/#write

activesupport/lib/active_support/cache/compressed_mem_cache_store.rb

@@ -1,14 +1,14 @@
 module ActiveSupport
   module Cache
     class CompressedMemCacheStore < MemCacheStore
-      def read(name, options = {})
-        if value = super(name, options.merge(:raw => true))
+      def read(name, options = nil)
+        if value = super(name, (options || {}).merge(:raw => true))
           Marshal.load(ActiveSupport::Gzip.decompress(value))
         end
       end
 
-      def write(name, value, options = {})
-        super(name, ActiveSupport::Gzip.compress(Marshal.dump(value)), options.merge(:raw => true))
+      def write(name, value, options = nil)
+        super(name, ActiveSupport::Gzip.compress(Marshal.dump(value)), (options || {}).merge(:raw => true))
       end
     end
   end