remove wrong code in immed_double_const

[Mike Stump]

This removes some wrong code.

Ok?

Index: gcc/emit-rtl.c
===================================================================
--- gcc/emit-rtl.c      (revision 184563)
+++ gcc/emit-rtl.c      (working copy)
@@ -540,8 +540,6 @@ immed_double_const (HOST_WIDE_INT i0, HO
 
       if (GET_MODE_BITSIZE (mode) <= HOST_BITS_PER_WIDE_INT)
        return gen_int_mode (i0, mode);
-
-      gcc_assert (GET_MODE_BITSIZE (mode) == 2 * HOST_BITS_PER_WIDE_INT);
     }
 
   /* If this integer fits in one word, return a CONST_INT.  */