comperr.adb: Fix problem with suppressing warning messages from gigi

comperr.adb: Fix problem with suppressing warning messages from gigi

2007-08-14  Robert Dewar  <dewar@adacore.com>

	* comperr.adb: Fix problem with suppressing warning messages from gigi

	* erroutc.ads, erroutc.adb, errout.ads,
	errout.adb (Write_Eol): Remove trailing spaces before writing the line
	(Write_Eol_Keep_Blanks): New procedure to write a line, including
	possible trailing spaces.
	(Output_Source_Line): Call Write_Eol_Keep_Blanks to output a source line
	Fix problem with suppressing warning messages from back end
	Improve handling of deleted warnings

	* gnat1drv.adb:
	Fix problem with suppressing warning messages from back end
	Handle setting of Static_Dispatch_Tables flag.

	* prepcomp.adb:
	Fix problem with suppressing warning messages from back end

	* exp_intr.adb: Improve handling of deleted warnings

From-SVN: r127413