c-common.c (lvalue_or_else): Replace by lvalue_error; only give diagnostic without...

c-common.c (lvalue_or_else): Replace by lvalue_error; only give diagnostic without checking whether an lvalue.

	* c-common.c (lvalue_or_else): Replace by lvalue_error; only give
	diagnostic without checking whether an lvalue.
	* c-common.h (lvalue_p): Remove.
	(enum lvalue_use): Update comment.
	(lvalue_or_else): Replace by lvalue_error.
	* c-typeck.c (lvalue_p): Make static.
	(lvalue_or_else): New.  Call lvalue_error.

cp:
	* cp-tree.h (lvalue_or_else, lvalue_p): New.
	* typeck.c (lvalue_or_else): New.  Call lvalue_error.

From-SVN: r96776