util.h: Add missing gcc pragma push before pragma pop

While building with clang:

  ./util.h:176:24: warning: pragma diagnostic pop could not pop, no matching push [-Wunknown-pragmas]

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>

1 files changed, 1 insertions, 0 deletions

diff --git a/util.h b/util.h
index b1eadfd..4d1b375 100644
--- a/util.h
+++ b/util.h
@@ -165,6 +165,7 @@
 struct ctx;
 
 struct ipv6hdr {
+#pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wpedantic"
 #if __BYTE_ORDER == __BIG_ENDIAN
 	uint8_t			version:4,