Wim Taymans authored Sep 13, 2009 and David Schleef committed Sep 19, 2009

When we register a RuleSet for an OpcodeSet, don't keep a pointer from the
RuleSet to the OpcodeSet because the OpcodeSet pointer can change (due to
realloc) when we register new OpcodeSets.

Instead, keep the opcode_major and use this to get the right index in the
OpcodeSet.