qemu_firmware: only set nfeatures on success

The field is set just before returning on success.
Signed-off-by: NMarc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>
Signed-off-by: NJán Tomko <jtomko@redhat.com>

src/qemu/qemu_firmware.c

@@ -592,8 +592,6 @@ qemuFirmwareFeatureParse(const char *path,
     if (VIR_ALLOC_N(features, nfeatures) < 0)
         return -1;
 
-    fw->nfeatures = nfeatures;
-
     for (i = 0; i < nfeatures; i++) {
         virJSONValuePtr item = virJSONValueArrayGet(featuresJSON, i);
         const char *tmpStr = virJSONValueGetString(item);