PR c/68187: fix overzealous -Wmisleading-indentation (comment #1)

PR c/68187: fix overzealous -Wmisleading-indentation (comment #1)

gcc/c-family/ChangeLog:
	PR c/68187
	* c-indentation.c (get_visual_column): Move code to determine next
	tab stop to...
	(next_tab_stop): ...this new function.
	(line_contains_hash_if): Delete function.
	(detect_preprocessor_logic): Delete function.
	(get_first_nws_vis_column): New function.
	(detect_intervening_unindent): New function.
	(should_warn_for_misleading_indentation): Replace call to
	detect_preprocessor_logic with a call to
	detect_intervening_unindent.

gcc/testsuite/ChangeLog:
	PR c/68187
	* c-c++-common/Wmisleading-indentation.c (fn_42_a): New test
	function.
	(fn_42_b): Likewise.
	(fn_42_c): Likewise.

From-SVN: r233972