af-packet: synchronize flags sizes

They are passed from config to threads so they need to be of the
same size.

src/source-af-packet.c

@@ -207,7 +207,7 @@ typedef struct AFPThreadVars_
     /* handle state */
     uint8_t afp_state;
     uint8_t copy_mode;
-    uint8_t flags;
+    unsigned int flags;
 
     /* IPS peer */
     AFPPeer *mpeer;

src/source-af-packet.h

@@ -84,7 +84,7 @@ typedef struct AFPIfaceConfig_
     /* promisc mode */
     int promisc;
     /* misc use flags including ring mode */
-    int flags;
+    unsigned int flags;
     int copy_mode;
     ChecksumValidationMode checksum_mode;
     const char *bpf_filter;