diffcore-delta: rename 'new' variables

Rename C++ keyword in order to bring the codebase closer to being able
to be compiled with a C++ compiler.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diffcore-delta.c

@@ -48,36 +48,36 @@ struct spanhash_top {
 
 static struct spanhash_top *spanhash_rehash(struct spanhash_top *orig)
 {
-	struct spanhash_top *new;
+	struct spanhash_top *new_spanhash;
 	int i;
 	int osz = 1 << orig->alloc_log2;
 	int sz = osz << 1;
 
-	new = xmalloc(st_add(sizeof(*orig),
+	new_spanhash = xmalloc(st_add(sizeof(*orig),
 			     st_mult(sizeof(struct spanhash), sz)));
-	new->alloc_log2 = orig->alloc_log2 + 1;
-	new->free = INITIAL_FREE(new->alloc_log2);
-	memset(new->data, 0, sizeof(struct spanhash) * sz);
+	new_spanhash->alloc_log2 = orig->alloc_log2 + 1;
+	new_spanhash->free = INITIAL_FREE(new_spanhash->alloc_log2);
+	memset(new_spanhash->data, 0, sizeof(struct spanhash) * sz);
 	for (i = 0; i < osz; i++) {
 		struct spanhash *o = &(orig->data[i]);
 		int bucket;
 		if (!o->cnt)
 			continue;
 		bucket = o->hashval & (sz - 1);
 		while (1) {
-			struct spanhash *h = &(new->data[bucket++]);
+			struct spanhash *h = &(new_spanhash->data[bucket++]);
 			if (!h->cnt) {
 				h->hashval = o->hashval;
 				h->cnt = o->cnt;
-				new->free--;
+				new_spanhash->free--;
 				break;
 			}
 			if (sz <= bucket)
 				bucket = 0;
 		}
 	}
 	free(orig);
-	return new;
+	return new_spanhash;
 }
 
 static struct spanhash_top *add_spanhash(struct spanhash_top *top,