As a bodybuilder, you're trying to stay lean and build plenty of muscle. Consuming a small meal about an hour before your workout–not a heavy one that will sit lean in your stomach--will help you see the muscle growth you're looking for. Your small meal should be made up of equal parts lean protein and carbs. Some great ideas include:

Egg whites
    Whey protein isolate
    Fruit, including oranges, strawberries, or apples
    Brown rice or long-grain white rice
    Oatmeal
    Wheat pasta
    Chicken or turkey

Note that timing and portion control are critical in this pre-workout meal. You want to eat enough to give you energy and fuel your muscles throughout your workout, but you also want to be sure that you're eating early enough and light enough that your food won't sit heavy in your stomach, slowing you down throughout your workout. Combining some of the sources of lean protein mentioned above with the quicker-digesting carbohydrates about an hour before your workout will ensure that you get the nutrition punch you need to keep building muscle.