Method add

src/com/winvector/opt/def/VEval.java:51–66

slow operation assumes the two x's are the same @param o

(final VEval o)

	 * @param o
	 */
	public void add(final VEval o) {
		final int dim = x.length;
		fx += o.fx;
		if(gx!=null) {
			for(int i=0;i<dim;++i) {
				gx[i] += o.gx[i];
			}
		}
		if(hx!=null) {
			for(int i=0;i<dim;++i) {
				for(int j=0;j<dim;++j) {
					hx[i][j] += o.hx[i][j];
				}
			}
		}
	}
}