pool_error_func
cvp->error = pool_error_func;
cvp->warning = pool_error_func;
extern void pool_error_func(void *, const char *, ...);
cvp->error = pool_error_func;
cvp->warning = pool_error_func;
void pool_error_func(void *ctx, const char *msg, ...);
xmlSetGenericErrorFunc(NULL, pool_error_func);
cvp->error = pool_error_func;
cvp->warning = pool_error_func;