ip: Wrap CASE macro body in braces for pre-C23 compatibility

Compiling on RHEL8 (gcc-8.5) gives an error in ip.c.
ip.c:88:3: error: a label can only be part of a statement and
a declaration is not a statement due to the use of static_assert.

The fix is to surround it with {}.

Link: https://bugs.passt.top/show_bug.cgi?id=201
Fixes: 93c3e351f235 ("ip: Define a bound for the string returned by ipproto_name()")
Signed-off-by: Anshu Kumari <anskuma@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Laurent Vivier <lvivier@redhat.com>
[sbrivio: Fixed coding style]
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

1 files changed, 6 insertions, 4 deletions

diff --git a/ip.c b/ip.c
index f2506bb..7238700 100644
--- a/ip.c
+++ b/ip.c
@@ -34,10 +34,12 @@
 const char *ipproto_name(uint8_t proto)
 {
 	switch (proto) {
-#define CASE(s)								\
-		static_assert(sizeof(s) <= IPPROTO_STRLEN,		\
-			      "Increase IPPROTO_STRLEN to contain " #s); \
-		return s;
+#define CASE(s)								  \
+		{							  \
+			static_assert(sizeof(s) <= IPPROTO_STRLEN,	  \
+			       "Increase IPPROTO_STRLEN to contain " #s); \
+			return s;					  \
+		}
 	case IPPROTO_ICMP:
 		CASE("ICMP");
 	case IPPROTO_TCP: