Your body doesn't use it energy reserves like that. When you eat in the morning, all you're doing is shifting some glucose into your blood stream at the point in the day when your body is most insulin sensitive. This means the carbs are mobilised fast and stored as glycogen in your muscles or as fat
What you eat the night before is more likely to have an impact on your work out. You're not burning what you've eaten for breakfast in your weights work out, your body simply doesn't work like that. You don't even need to eat breakfast! Eat some complex carbs the night before, and I wouldn't worry too much about what you do the day of your work out unless you're scoffing sweets and sugary cake.
If you skip breakfast, or just eat a protein and fat based breakfast, you wont want to fall asleep mid morning/ mid day, and you wont feel peckish early on in the day either.