Bug in function isreal

Hello Pavel.

I found another bug in the isreal() function.

If we store real and complex data in the same array, the function isreal() gives always 0, even for entries with 0 imaginary part.

test(1,1)=mp('1i');
test(1,2)=mp('1');
isreal(test(1,1))
isreal(test(1,2))

ans =

  logical

   0

ans =

  logical

   0

This is differnt compared to the standard Matlab behaviour:

test(1,1)=1i;
test(1,2)=1;
isreal(test(1,1))
isreal(test(1,2))

ans =

  logical

   0

ans =

  logical

   1

Best regards,

Michael