[fpc-pascal] Convert to int64 note

[Santiago A.]

El 14/07/2017 a las 1:13, james at productionautomation.net escribió:
> I've been trying to get my programs to compile without any warnings or notes, but I keep getting this one:
>
> promill.pas(2137,42) Hint: Converting the operands to "Int64" before doing the subtract could prevent overflow errors.
>
> I get it a lot, but this is the line the above example is from:
>
> Last_GS:=G_End-(Max_Program_To_Display-1);
>
> Can someone please explain that this hint means and how I would convert the operands to "Int64" as recommended?
>
> James
>
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What's the type of each variable?

-- 
Saludos

Santiago A.