re PR c/53532 (function call ignored when called with argument of incompatible, undefined structure)

	PR c/53532
	PR c/51034
	PR c/53196
	* c-decl.c (build_compound_literal): Call c_incomplete_type_error
	if type isn't complete.

	* gcc.dg/pr53532.c: New test.
	* gcc.dg/c99-complit-2.c: Add two new dg-error directives,
	adjust line numbers.
	* gcc.dg/noncompile/950825-1.c: Expect incomplete type error message.
	* gcc.dg/Wcxx-compat-8.c: Likewise.
	* gcc.dg/pr51034.c: New test.
	* gcc.dg/pr53196-1.c: New test.
	* gcc.dg/pr53196-2.c: New test.

From-SVN: r188483