Coverity: Initialize member variables.

sandbox/linux/seccomp-bpf/sandbox_bpf.h

Index: sandbox/linux/seccomp-bpf/sandbox_bpf.h
diff --git a/sandbox/linux/seccomp-bpf/sandbox_bpf.h b/sandbox/linux/seccomp-bpf/sandbox_bpf.h
index d97aeaf21e06fc7decc7c175f454176437834d70..3696668661f7e4683e30a154dfa059c917a80c4e 100644
--- a/sandbox/linux/seccomp-bpf/sandbox_bpf.h
+++ b/sandbox/linux/seccomp-bpf/sandbox_bpf.h
@@ -176,7 +176,10 @@ class Sandbox {
     // field.
     // This is not only quiet efficient, it also makes the API really easy to
     // use.
-    ErrorCode(int err = SB_INVALID) {
+    ErrorCode(int err = SB_INVALID)
+        : id_(0),
+          fnc_(NULL),
+          aux_(NULL) {
       switch (err) {
       case SB_INVALID:
         err_ = SECCOMP_RET_INVALID;