Properly initialize Archive_Current_Size to 0 in twrpTar

Change-Id: I30b67787b1d529d6bdf462c8e0bf2338a9961eff
diff --git a/twrpTar.cpp b/twrpTar.cpp
index dfaa541..90c7ea3 100644
--- a/twrpTar.cpp
+++ b/twrpTar.cpp
@@ -61,6 +61,7 @@
 	pigz_pid = 0;
 	oaes_pid = 0;
 	Total_Backup_Size = 0;
+	Archive_Current_Size = 0;
 	include_root_dir = true;
 }