fixes without_count last_page? behaviour

kaminari-activerecord/lib/kaminari/activerecord/active_record_relation_methods.rb

@@ -59,11 +59,11 @@ def load
       else
         @values[:limit] = limit_value + 1
         # FIXME: this could be removed when we're dropping AR 4 support
-        @arel.limit = @values[:limit] if @arel && (Integer === @arel.limit)
+        @arel.limit = adjusted_limit(@values[:limit]) if @arel && adjustable?(@arel.limit)
         super
         @values[:limit] = limit_value - 1
         # FIXME: this could be removed when we're dropping AR 4 support
-        @arel.limit = @values[:limit] if @arel && (Integer === @arel.limit)
+        @arel.limit = adjusted_limit(@values[:limit]) if @arel && adjustable?(@arel.limit)
 
         if @records.any?
           @records = @records.dup if (frozen = @records.frozen?)
@@ -75,6 +75,21 @@ def load
       end
     end
 
+    def adjustable?(obj)
+      return true if obj.class == Integer || obj.class == Fixnum
+      return true if obj.class == Arel::Nodes::BindParam && obj.respond_to?(:value)
+      false
+    end
+
+    def adjusted_limit(limit)
+      case @arel.limit.class
+      when Integer, Fixnum
+        limit
+      when Arel::Nodes::BindParam
+        Arel::Nodes::BindParam.new(@arel.limit.value.with_cast_value(limit))
+      end
+    end
+
     # The page wouldn't be the last page if there's "limit + 1" record
     def last_page?
       !out_of_range? && !@_has_next