Fix verify error when decorating class that has action methods or constructors with wide parameters.
Long and double takes 2 stack slots, but AsmBackedClassGenerator doesn't count it in mind and creates incorrect bytecode for methods like these:
void name(long arg, Action action)
<init>(double arg, Object any)
(when wide parameter isn't last argument in general case).
Signed-off-by: Sergey Shatunov <me@prok.pw>