remove infinite loop in t_stopcont

Remove useless preprocessor define.

Terminate the child after 15 seconds.

Since the parent is waiting for the child to terminate it is still
guaranteed that the child was continued.

programs/tests/t_stopcont.c

@@ -41,18 +41,16 @@ int main(int argc, char *argv[])
         sleep(2);
         printf("Sending stop sig to child\n");
 
-#if 1
         if (kill(child_pid, SIGSTOP) == -1)
             printf("Errore invio stop\n");
-#endif
 
         wait(NULL);
     } else {
-        int c = 0;
-        for (;;) {
-            printf("c: %d\n", c++);
+        for (int c = 0; c < 5; c++) {
+            printf("c: %d\n", c);
             sleep(3);
         }
+        exit(0);
     }
 
     return 0;