svm fit numpy array indexing deprecation warning fix.

To fix this:
./sklearn/svm/base.py:234: DeprecationWarning: using a non-integer number instead of an integer will result in an error in the future max_iter=self.max_iter, random_seed=random_seed)

One change in libsvm.pyx:
207	-    intercept = np.empty(n_class*(n_class-1)/2, dtype=np.float64)
207  +    intercept = np.empty(int((n_class*(n_class-1))/2), dtype=np.float64)
Then cython generated libsvm.c