Convert to 32-bit signed integer
For infinite and NaNs values, Scilab and Matlab int32 return different values.
Matlab Scilab
A = `int32`_(inf)
A = 2147483647
A = `int32`_(-inf)
A = -2147483648
A = `int32`_(nan)
A = 0
A = `int32`_(%inf)
A = -2147483648
A = `int32`_(-%inf)
A = -2147483648
A = `int32`_(%nan)
A = -2147483648