Remove stray semicolon after pragma macros

The VIR_WARNINGS_NO_CAST_ALIGN / VIR_WARNINGS_RESET should
not have any trailing ';' since they are pragmas. The use
of a ';' results in an empty statement which confuses CIL.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

src/nwfilter/nwfilter_dhcpsnoop.c

@@ -981,9 +981,9 @@ virNWFilterSnoopDHCPDecode(virNWFilterSnoopReqPtr req,
     /* go through the protocol headers */
     switch (ntohs(pep->eh_type)) {
     case ETHERTYPE_IP:
-        VIR_WARNINGS_NO_CAST_ALIGN;
+        VIR_WARNINGS_NO_CAST_ALIGN
         pip = (struct iphdr *) pep->eh_data;
-        VIR_WARNINGS_RESET;
+        VIR_WARNINGS_RESET
         len -= offsetof(virNWFilterSnoopEthHdr, eh_data);
         break;
     default: