[PATCH] a small (~.4%) memory savings in convert.c

[Andrew Pinski]

I noticed that we building a NOP_EXPR in convert even though we call 
fold after
calling convert (and convert_to_integer).  This patch changes one 
build1 to be
fold_build1 and it saves about .4% of the memory while compiling 
PR8361.  It might
help other testcases more but I have not looked into this yet.

OK? Bootstrapped and tested on powerpc-darwin7.9.0 with no regressions.

:ADDPATCH convert.c:

Thanks,
Andrew Pinski

ChangeLog:
	* convert.c (convert_to_integer): Use fold_build1 instead of
	build1 when converting an integer to an integer.


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