bug: use uint32_t for IP numbers

The commit 1e82461875 was
incomplete, and at the end was a cause of off by one miscount.
The reason was bsearch where long int needed to be unsigned.
Weird that the original had work while there where so many type
mismatches.

Signed-off-by: Sami Kerola <kerolasa@iki.fi>

src/analyze.c

@@ -64,7 +64,7 @@ int prepare_data(void)
 	for (i = 0; i < num_touches; i++) {
 		if (bsearch
 		    (&touches[i], leases, (size_t) num_leases,
-		     sizeof(long int), &intcomp) == NULL) {
+		     sizeof(uint32_t), &intcomp) == NULL) {
 			touches[j] = touches[i];
 			j++;
 		}