[UDP]: Fix reversed logic in udp_get_port().

When this code was converted to use sk_for_each() the
logic for the "best hash chain length" code was reversed,
breaking everything.

The original code was of the form:

size = 0;
do {
if (++size >= best_size_so_far)
goto next;
} while ((sk = sk->next) != NULL);
best_size_so_far = size;
best = result;
next:;

and this got converted into:

sk_for_each(sk2, node, head)
if (++size < best_size_so_far) {
best_size_so_far = size;
best = result;
}

Which does something very very different from the original.

Signed-off-by: David S. Miller <[e-mail]>

net/ipv4/udp.c

···
 				goto gotit;
 			}
 			size = 0;
-			sk_for_each(sk2, node, head)
-				if (++size < best_size_so_far) {
-					best_size_so_far = size;
-					best = result;
-				}
+			sk_for_each(sk2, node, head) {
+				if (++size >= best_size_so_far)
+					goto next;
+			}
+			best_size_so_far = size;
+			best = result;
+		next:
+			;
 		}
 		result = best;
 		for(i = 0; i < (1 << 16) / UDP_HTABLE_SIZE; i++, result += UDP_HTABLE_SIZE) {