Merge pull request #21095 from benpicco/drivers/at24cxxx-fix_set

drivers/at24cxxx: fix uninitialized return value in `_set()`

drivers/at24cxxx/at24cxxx.c

@@ -188,7 +188,7 @@ int _write(const at24cxxx_t *dev, uint32_t pos, const void *data, size_t len)
 static
 int _set(const at24cxxx_t *dev, uint32_t pos, uint8_t val, size_t len)
 {
-    int check;
+    int check = 0;
     uint8_t set_buffer[AT24CXXX_SET_BUF_SIZE];
 
     memset(set_buffer, val, sizeof(set_buffer));