Stop using the column for type information in sanitization

As we move towards removing the types from the column objects, any
remaining places which have access to richer type information should be
using it.

activerecord/lib/active_record/sanitization.rb

@@ -107,7 +107,8 @@ def sanitize_sql_hash_for_conditions(attrs, default_table_name = self.table_name
       def sanitize_sql_hash_for_assignment(attrs, table)
         c = connection
         attrs.map do |attr, value|
-          "#{c.quote_table_name_for_assignment(table, attr)} = #{quote_bound_value(value, c, columns_hash[attr.to_s])}"
+          value = type_for_attribute(attr.to_s).type_cast_for_database(value)
+          "#{c.quote_table_name_for_assignment(table, attr)} = #{c.quote(value)}"
         end.join(', ')
       end
 
@@ -163,10 +164,8 @@ def replace_named_bind_variables(statement, bind_vars) #:nodoc:
         end
       end
 
-      def quote_bound_value(value, c = connection, column = nil) #:nodoc:
-        if column
-          c.quote(value, column)
-        elsif value.respond_to?(:map) && !value.acts_like?(:string)
+      def quote_bound_value(value, c = connection) #:nodoc:
+        if value.respond_to?(:map) && !value.acts_like?(:string)
           if value.respond_to?(:empty?) && value.empty?
             c.quote(nil)
           else