Patch for uninitialized structures in tests

[Steve Ellcey]

> They do depend on the initialization values for the following reason.

In fact we don't even need a NaN for some of the tests to fail.  Take
gcc.dg/struct/wo_prof_global_var.c for example.  The floating point
field b is uninitialized.  Let's say it happens to have 3.2 in it.  When
we do "p[i].a = p[i].b + 1" The integer field "p[i].a" will wind up with
4 when it gets truncated to an integer value.  Then when we compare
"p[i].a != p[i].b + 1" "p[i].a" will be 4 and "p[i].b + 1" will be 4.2.

I still think it wrong for the test to assume that malloced space is
initalized.

>From the C99 standard, Section 7.20.3.3:

	The malloc function allocates space for an object whose size is
	specified by size and whose value is indeterminate.

Steve Ellcey
sje@cup.hp.com