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According to the Mayo Clinic these are some known causes of leg cramps. As you can see alcoholism and dehydration are listed. I doubt that a couple of glasses of wine will cause them, but drinking water right before going to bed may help.
Drinking plenty of water is essential, since cramps are often caused by dehydration. A healthy diet with plenty of fresh fruits and vegetables can also help to decrease the frequency of leg cramps. If you do get leg cramps frequently, especially nocturnal leg cramps it could be due to an electrolyte imbalance.