[NETFILTER]: x_tables: switch xt_match->checkentry to bool

Switch the return type of match functions to boolean

Signed-off-by: Jan Engelhardt <jengelh@gmx.de>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/netfilter/xt_tcpudp.c b/net/netfilter/xt_tcpudp.c
index 9ecc4a5..0dd3022 100644
--- a/net/netfilter/xt_tcpudp.c
+++ b/net/netfilter/xt_tcpudp.c
@@ -133,7 +133,7 @@
 }
 
 /* Called when user tries to insert an entry of this type. */
-static int
+static bool
 tcp_checkentry(const char *tablename,
 	       const void *info,
 	       const struct xt_match *match,
@@ -181,7 +181,7 @@
 }
 
 /* Called when user tries to insert an entry of this type. */
-static int
+static bool
 udp_checkentry(const char *tablename,
 	       const void *info,
 	       const struct xt_match *match,