fp-bit.c typo patch

[David Edelsohn]

	This patch fixes a bootstrap failure caused by the recent fp-bit.c
change.

Sun Dec 28 00:30:24 1997  David Edelsohn  <edelsohn@mhpcc.edu>

	* config/fp-bit.c (L_df_to_sf): Fix typo in last change.

*** fp-bit.c-   Sun Dec 28 00:28:45 1997
--- fp-bit.c    Sun Dec 28 00:29:55 1997
***************
*** 1483,1487 ****
  #endif
  
! #if (L_df_to_sf)
  SFtype
  df_to_sf (DFtype arg_a)
--- 1483,1487 ----
  #endif
  
! #if defined(L_df_to_sf)
  SFtype
  df_to_sf (DFtype arg_a)