PR debug/7241
	* dwarf2out.c (base_type_die): Compare char_type_node with
	TYPE_MAIN_VARIANT (type), not type.

	* gcc.dg/debug/dwarf2/dwarf-char1.c: New test.
	* gcc.dg/debug/dwarf2/dwarf-char2.c: New test.
	* gcc.dg/debug/dwarf2/dwarf-char3.c: New test.

	* gcc.dg/debug/dwarf2/dwarf-die1.c: Fix a typo.
	* gcc.dg/debug/dwarf2/dwarf-die2.c: Likewise.
	* gcc.dg/debug/dwarf2/dwarf-die3.c: Likewise.
	* gcc.dg/debug/dwarf2/dwarf-die5.c: Likewise.
	* gcc.dg/debug/dwarf2/dwarf-die6.c: Likewise.
	* gcc.dg/debug/dwarf2/dwarf-die7.c: Likewise.
	* gcc.dg/debug/dwarf2/dwarf-uninit.c: Likewise.
	* gcc.dg/debug/dwarf2/dwarf2-macro.c: Likewise.

From-SVN: r103727