First round of fixes out of coverity defects. Mostly uninstialized variables

mediachanger/castorrmc/common/Cinitdaemon.c

@@ -40,6 +40,7 @@ int Cinitdaemon(char *name,
         if ( wait4child != NULL ) {
                 sa.sa_handler = wait4child;
                 sa.sa_flags = SA_RESTART;
+                sa.sa_restorer = NULL;
                 sigaction (SIGCHLD, &sa, NULL);
         }
         return (maxfds);

mediachanger/castorrmc/common/socket_timeout.c

@@ -304,6 +304,7 @@ Sigfunc *_netsignal(int signo,
 	act.sa_handler = func;
 	sigemptyset(&act.sa_mask);
 	act.sa_flags = 0;
+	act.sa_restorer = NULL;
 	if (signo == SIGALRM) {
 #ifdef	SA_INTERRUPT
 		act.sa_flags |= SA_INTERRUPT;	/* SunOS 4.x */