[PATCH] Fix PR 14156, warning about returning addresses to parameters

[Andrew Pinski]

Basically the problem is that the code does not check for parameters 
when
warning about the return was an address to a local variable.  This patch
fixes that by adding the check.

Thanks,
Andrew Pinski

OK? Bootstrapped on powerpc-apple-darwin7.2.0 with no regressions?
Ok for 3.4 also, even though this is not a regression but a two simple 
fix?
Okay for 3.3.4 also as again this is a simple fix?


ChangeLog:
	* c-typeck.c (c_expand_return): Add check for PARM_DECL.

cp/ChangeLog:
	* typeck.c (maybe_warn_about_returning_address_of_location):
	Add check for PARM_DECL.


Patch:

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Testcase:

/* { dg-do compile  } */

int * f( int a)
{
	return &a; /* { dg-warning "address" "" } */
}

int * g()
{
	int b = 0;

	return &b; /* { dg-warning "address" "" } */
}