[committed] Don't use convert in the middle end.

[Kaveh R. Ghazi]

 >  Hi,
 >   I found a couple more uses of convert in the middle end.  Roger
 > said getting rid of the uses in expmed.c and stmt.c were preapproved
 > on IRC after the usual bootstrap and regtest.  This patch has been
 > bootstrapped and regtested on powerpc-linux with all languages except
 > Ada and Java, committed to mainline.
 > Jim

I keep seeing this, does it make sense to poison "convert" in rtl.h so
it doesn't regress?

We could define a macro "really_call_convert" like we do for "malloc"
if there are any places where we need to bypass the poison.

		--Kaveh
--
Kaveh R. Ghazi			ghazi@caip.rutgers.edu