in_ebpf: Initialize with 0 for preventing garbage address

Signed-off-by: Hiroshi Hatake <hiroshi@chronosphere.io>

Author: cosmo0920

plugins/in_ebpf/traces/tcp/bpf.c

@@ -90,7 +90,13 @@ static __always_inline void parse_sockaddr(const struct sockaddr *addr,
 {
     sa_family_t family;
 
-    if (!addr || !out) {
+    if (!out) {
+        return;
+    }
+
+    __builtin_memset(out, 0, sizeof(*out));
+
+    if (!addr) {
         return;
     }