esx: Use memcpy() in esxVI_CURL_Debug()

We're going to change virStrncpy() in a way that
requires the source string to be NULL-terminated, so
we'll no longer be able to use in this context.
Signed-off-by: NAndrea Bolognani <abologna@redhat.com>

src/esx/esx_vi.c

@@ -185,10 +185,8 @@ esxVI_CURL_Debug(CURL *curl ATTRIBUTE_UNUSED, curl_infotype type,
     if (VIR_ALLOC_N(buffer, size + 1) < 0)
         return 0;
 
-    if (virStrncpy(buffer, info, size, size + 1) < 0) {
-        VIR_FREE(buffer);
-        return 0;
-    }
+    memcpy(buffer, info, size);
+    buffer[size] = '\0';
 
     switch (type) {
       case CURLINFO_TEXT: