Adding a meal with the maximum possible calorie value will add it as negative calories.

[philip1304]

Adding a meal entry with the maximum possible calorie value (2147483647 as stated in the program) will add the meal with that number but as negative calories.

Steps to reproduce:

1. Add a meal entry with the add mealEntry command, but input the calorie value as 2147483647. E.g., add mealEntry Pizza /c2147483647.
2. The program will record the day the meal is consumed as having -2147483647 current calories consumed, with a -96041207% percentage.

[nus-pe-script]

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