Cleaned up the lenA < lenB case in fmpq_poly_gcd.
Cleaned up the lenA < lenB case in fmpq_poly_gcd.

dsroche/flint2,dsroche/flint2,wbhart/flint2,fredrik-johansson/flint2,jpflori/flint2,wbhart/flint2,jpflori/flint2,fredrik-johansson/flint2,dsroche/flint2,jpflori/flint2,wbhart/flint2,jpflori/flint2,dsroche/flint2,fredrik-johansson/flint2