repacker: add root overwrite warning

Change-Id: Ica03c62a04872cb0ff4705810a0e85efde0b0b54
diff --git a/twrpRepacker.cpp b/twrpRepacker.cpp
index d959836..b9f8597 100755
--- a/twrpRepacker.cpp
+++ b/twrpRepacker.cpp
@@ -259,6 +259,7 @@
 		TWFunc::removeDir(REPACK_ORIG_DIR, false);
 	}}
 	TWFunc::removeDir(REPACK_NEW_DIR, false);
+	gui_msg(Msg(msg::kWarning, "repack_overwrite_warning=If device was previously rooted, then root has been overwritten and will need to be reinstalled."));
 	return true;
 }