parse.y (java_complete_lhs): Check if patch_assignment returned an error-mark.

parse.y (java_complete_lhs): Check if patch_assignment returned an error-mark.

	* parse.y (java_complete_lhs):  Check if patch_assignment
	returned an error-mark.

	* parse.y (try_builtin_assignconv):  Don't special-case zero.

From-SVN: r50499