PR c++/19457
	* call.c (convert_like_real): Inline call to
	dubious_conversion_warnings here.
	* cp-tree.h (dubious_conversion_warnings): Remove.
	* semantics.c (finish_unary_op_expr): Copy INTEGER_CSTs before
	setting TREE_NEGATED_INT.
	* typeck.c (dubious_conversion_warnings): Remove.

	PR c++/19349
	* name-lookup.c (pushdecl_namespace_level): Avoid accessing free'd
	memory.

	PR c++/19457
	* g++.dg/warn/conv3.C: New test.

From-SVN: r94463