{
size_t lp[12*sizeof(size_t)];
size_t i, size = width * nel;
- unsigned char *head = base,
- *high = head + size - width;
+ unsigned char *head, *high;
size_t p[2] = {1, 0};
int pshift = 1;
int trail;
+ if (!size) return;
+
+ head = base;
+ high = head + size - width;
+
/* Precompute Leonardo numbers, scaled by element width */
for(lp[0]=lp[1]=width, i=2; (lp[i]=lp[i-2]+lp[i-1]+width) < size; i++);