pdblib: make color id Int8, as some dbs appear to have two Int8 fields

Author: flesniak

prodj/pdblib/color.py

@@ -1,9 +1,10 @@
-from construct import Struct, Int16ub, Padding
+from construct import Struct, Int8ul, Padding
 from .piostring import PioString
 
 Color = Struct(
   Padding(4),
-  "id" / Int16ub,
+  "id_dup" / Int8ul, # set on some dbs, equals id
+  "id" / Int8ul,
   Padding(2),
   "name" / PioString
 )