Typecasting to int to resolve warning:#68-D: integer conversion resulted in a change of sign

Author: Deepika

features/storage/FEATURE_STORAGE/cfstore/source/configuration_store.c

@@ -2392,7 +2392,7 @@ static int32_t cfstore_delete_ex(cfstore_area_hkvt_t* hkvt)
     memset(ctx->area_0_tail-kv_size, 0, kv_size);
 
     /* The KV area has shrunk so a negative size_diff should be indicated to cfstore_file_update(). */
-    ret = cfstore_file_update(hkvt->head, -1 * kv_size);
+    ret = cfstore_file_update(hkvt->head, -1 *(int32_t)kv_size);
     if(ret < ARM_DRIVER_OK){
         CFSTORE_ERRLOG("%s:Error:file update failed\n", __func__);
         goto out0;