Fix seccomp sandbox for gcc44

sandbox/linux/seccomp/debug.cc

 #ifndef NDEBUG
 
 #include "debug.h"
 
 namespace playground {
 
 bool Debug::enabled_;
 int  Debug::numSyscallNames_;
 const char **Debug::syscallNames_;
 std::map<int, std::string> Debug::syscallNamesMap_;
@@ skipping 130 matching lines @@
 void Debug::syscall(int sysnum, const char* msg, int call) {
   // This function gets called from the system call wrapper. Avoid calling
   // any library functions that themselves need system calls.
   if (enabled_) {
     const char *sysname = NULL;
     if (sysnum >= 0 && sysnum < numSyscallNames_) {
       sysname = syscallNames_[sysnum];
     }
     char unnamed[40] = "Unnamed syscall #";
     if (!sysname) {
-      itoa(strrchr(sysname = unnamed, '\000'), sysnum);
+      itoa(const_cast<char*>(strrchr(sysname = unnamed, '\000')), sysnum);
     }
     #if defined(__NR_socketcall) || defined(__NR_ipc)
     char extra[40];
     *extra = '\000';
     #if defined(__NR_socketcall)
     if (sysnum == __NR_socketcall) {
       static const char* socketcall_name[] = {
         0, "socket", "bind", "connect", "listen", "accept", "getsockname",
         "getpeername", "socketpair", "send", "recv", "sendto","recvfrom",
         "shutdown", "setsockopt", "getsockopt", "sendmsg", "recvmsg",
@@ skipping 54 matching lines @@
     *s--      = *start;
     *start++  = ch;
   }
 
   return ret;
 }
 
 } // namespace
 
 #endif // NDEBUG