Calling an Objective C IMP with floating point parameters

Floating point parameters are always passed via the stack. Remember that float gets promoted to double.

Convert:

   (*method)( obj, sel, (float) 0.0); return; 

to

#ifdef __MULLE_OBJC__
   mulle_objc_metaabi_param_block( double,   
                                   void *)  param;
   param.p.arg = 0.0;
   (*method)( *obj, sel, &param);
#else
   (*method)( *obj, sel, (float) 0.0);
#endif
}