* mips-tdep.c (mips_push_arguments): Always align struct_addr on a

* mips-tdep.c (mips_push_arguments): Always align struct_addr on a
16 byte boundary. Align allocated argument space using
MIPS_STACK_ARGSIZE.  Reserve space on stack for the struct return
and floating-point registers.  Use fp_register_arg_p to determine
if float_argreg should be aligned.