correct tests compile error and warning

src/tests/test_data_visible.c

@@ -127,7 +127,7 @@ int main(int argc, char *argv[])
     {
         return result;
     }
-    allocator.exceed_log_level = LOG_NOTHING;
+    allocator.alloc_elements.exceed_log_level = LOG_NOTHING;
 
     if ((result=init_pthread_lock(&lock)) != 0) {
         return result;

src/tests/test_file_lock.c

@@ -60,7 +60,7 @@ int main(int argc, char *argv[])
     int fd;
     int result;
     int sleep_seconds;
-    int n;
+    int n = 0;
     char buf[1024];
     struct flock lock;