change vector constructor for gcc-14

gcc-14, with the latest Yocto sync, fails with the following compile
failure:

```
| ../git/ipmbbridged.cpp:724:34: error: value computed is not used [-Werror=unused-value]
|   724 |     std::vector<uint8_t> buffer(0);
```

Attempt using the default constructor, which should be equivalent,
instead.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I2d79813a52354bb00d992d6edfd9e2cc3a3ceacf
diff --git a/ipmbbridged.cpp b/ipmbbridged.cpp
index 526983a..c25e1d6 100644
--- a/ipmbbridged.cpp
+++ b/ipmbbridged.cpp
@@ -721,7 +721,7 @@
 {
     makeRequestValid(request);
 
-    std::vector<uint8_t> buffer(0);
+    std::vector<uint8_t> buffer{};
     if (request->ipmbToi2cConstruct(buffer) != 0)
     {
         return returnStatus(ipmbResponseStatus::error);