cse.c compilation failed (EGCS-971225, target ARM)

[Jeffrey A Law]

  In message < Pine.LNX.3.96.971227194948.345G-100000@tardis.home.dave >you write:
  > Hi,
  >   Building cross from Alpha->ARM I get:
  > 
  > Alpha->ARM cross failed to build cse.c:
  > gcc -c -DCROSS_COMPILE -DIN_GCC    -g -O2  -DHAVE_CONFIG_H -DHAIFA    -I.
  > -I. -I./config cse.c
  > cse.c: In function `rtx_cost':
  > cse.c:755: multiple default labels in one switch
  > cse.c:751: this is the first default label
I think the ARM's way of handling RTX_COSTS is reasonable; similar
stuff is done for other ports.

I'll fix up cse.c; I'd punt trying to fix the case XXX not handled
warning for this one for now.

jeff