[libvirt PATCH] nwfilter: Fix timeout data type reported by coverity

[Erik Skultety <eskultet@xxxxxxxxxx>]

Coverity reports:
    virNWFilterSnoopIPLeaseUpdate(virNWFilterSnoopIPLease *ipl,
                                  time_t timeout)
    {
        if (timeout < ipl->timeout)
            return;  /* no take-backs */

        virNWFilterSnoopIPLeaseTimerDel(ipl);
 >>> CID 396747:  High impact quality  (Y2K38_SAFETY)
 >>> A "time_t" value is stored in an integer with too few bits
     to accommodate it. The expression "timeout" is cast to
     "unsigned int".
        ipl->timeout = timeout;
        virNWFilterSnoopIPLeaseTimerAdd(ipl);
    }

This is a safe fix, since time_t is just long int and scales
automatically with platform (more specifically it's 64bit on all
platforms we care about).

Signed-off-by: Erik Skultety <eskultet@xxxxxxxxxx>
---
 src/nwfilter/nwfilter_dhcpsnoop.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/nwfilter/nwfilter_dhcpsnoop.c b/src/nwfilter/nwfilter_dhcpsnoop.c
index a10a14cfc1..4133d4c672 100644
--- a/src/nwfilter/nwfilter_dhcpsnoop.c
+++ b/src/nwfilter/nwfilter_dhcpsnoop.c
@@ -146,7 +146,7 @@ struct _virNWFilterSnoopIPLease {
     virSocketAddr              ipAddress;
     virSocketAddr              ipServer;
     virNWFilterSnoopReq *    snoopReq;
-    unsigned int               timeout;
+    time_t timeout;
     /* timer list */
     virNWFilterSnoopIPLease *prev;
     virNWFilterSnoopIPLease *next;
@@ -1580,7 +1580,7 @@ virNWFilterSnoopLeaseFileWrite(int lfd, const char *ifkey,
         return -1;
 
     /* time intf ip dhcpserver */
-    lbuf = g_strdup_printf("%u %s %s %s\n", ipl->timeout, ifkey, ipstr, dhcpstr);
+    lbuf = g_strdup_printf("%lu %s %s %s\n", ipl->timeout, ifkey, ipstr, dhcpstr);
     len = strlen(lbuf);
 
     if (safewrite(lfd, lbuf, len) != len) {
@@ -1739,7 +1739,7 @@ virNWFilterSnoopLeaseFileLoad(void)
         }
         ln++;
         /* key len 54 = "VMUUID"+'-'+"MAC" */
-        if (sscanf(line, "%u %54s %15s %15s", &ipl.timeout,
+        if (sscanf(line, "%lu %54s %15s %15s", &ipl.timeout,
                    ifkey, ipstr, srvstr) < 4) {
             virReportError(VIR_ERR_INTERNAL_ERROR,
                            _("virNWFilterSnoopLeaseFileLoad lease file "
-- 
2.37.2