fix build on ppc when long double == double
diff --git a/src/powerpc/ffi.c b/src/powerpc/ffi.c
index baca694..257f02f 100644
--- a/src/powerpc/ffi.c
+++ b/src/powerpc/ffi.c
@@ -664,9 +664,11 @@ ffi_prep_cif_machdep (ffi_cif *cif)
switch (type)
{
#ifndef __NO_FPRS__
+#if FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE
case FFI_TYPE_LONGDOUBLE:
flags |= FLAG_RETURNS_128BITS;
/* Fall through. */
+#endif
case FFI_TYPE_DOUBLE:
flags |= FLAG_RETURNS_64BITS;
/* Fall through. */