views-exposed-widget had no id so i changed views-exposed-form.tpl.php

I was theming my exposed filters, and couldn't style each individual exposed filter because the divs had a class of views-exposed-widget but no unique identifier. it WAS like this (note no id in the div):

<div class="views-exposed-widget">
                  <label for="edit-uid">
            Name          </label>
                        <div class="views-widget"> ...

So I edited views-exposed-form.tpl.php in my modules/views/theme to look like this:

<div class="views-exposed-widget" id="<?php print $widget->id; ?>">

and now my html source looks like this (note the id in the div):

<div id="edit-uid" class="views-exposed-widget">
                  <label for="edit-uid">
            Name          </label>
                        <div class="views-widget"> ...

and edited my theme css to look like this:

#edit-uid.views-exposed-widget {
	clear:both;
	float:none;
	}

where edit-uid is the unique identifier for the exposed filter I'm trying to style.

Did I do the right thing? Is there a better/easier way around this? I don't like hacking files in modules because i will need to rehack when I update the module no?