ignore flags 1 and 2 : used to store compression mode in deflated

std/haxe/zip/Reader.hx

@@ -82,7 +82,7 @@ class Reader {
 		var version = i.readUInt16();
 		var flags = i.readUInt16();
 		var utf8 = flags & 0x800 != 0;
-		if( (flags & 0xF7F7) != 0 )
+		if( (flags & 0xF7F1) != 0 )
 			throw "Unsupported flags "+flags;
 		var compression = i.readUInt16();
 		var compressed = (compression != 0);