Fix attribute parsing on gcc 11.1.0

Fixes following compilation error:
"osmo-mgw/src/libosmo-mgcp/mgcp_stat.c:39:1: error: ‘integer’ attribute directive ignored"

Change-Id: Ia5167068abe8a22cd35a833396cbd7cb531c7e83
Fixes: f936e10f07b7a55d53a6f426b80364f6d368c5a0
diff --git a/src/libosmo-mgcp/mgcp_stat.c b/src/libosmo-mgcp/mgcp_stat.c
index 59ef917..e679882 100644
--- a/src/libosmo-mgcp/mgcp_stat.c
+++ b/src/libosmo-mgcp/mgcp_stat.c
@@ -33,7 +33,7 @@
 /* Helper function for mgcp_format_stats_rtp() to calculate packet loss */
 #if defined(__has_attribute)
 #if __has_attribute(no_sanitize)
-__attribute__((no_sanitize("integer")))
+__attribute__((no_sanitize("undefined")))
 #endif
 #endif
 void calc_loss(struct mgcp_conn_rtp *conn, uint32_t *expected, int *loss)