Patch to fix i960 objc runtime build

[Stan Shebs]

John Wehle wrote:
> 
> Currently the i960 objc runtime fails to build:
> 
>[...]
> 
> because the i960 ROUND_TYPE_ALIGN macro uses REAL_TYPE which isn't defined.

> + #define REAL_TYPE       _C_DBL

OK, I give up.  How is this supposed to work?  REAL_TYPE as used in
ROUND_TYPE_ALIGN is unrelated to the ObjC encoding char _C_DBL, at
least as I understand the code.

Stan