Simplify the RETLDM macro's unused arguments for compatibility with Clang/LLVM 3.1.
Simplify the RETLDM macro's unused arguments for compatibility with Clang/LLVM 3.1.

Signed-off-by: Zachary Waldowski <f6cb034ae1bf314d2c0261a7a22e4684d1f74b57@gmail.com>

jspahrsummers/libffi,zwaldowski/libffi-iOS,jspahrsummers/libffi,pandamonia/libffi-iOS,zwaldowski/libffi-iOS,zwaldowski/libffi-iOS,pandamonia/libffi-iOS,zwaldowski/libffi-iOS,zwaldowski/libffi-iOS,jspahrsummers/libffi,pandamonia/libffi-iOS,jspahrsummers/libffi