gcc
	* c-parser.c (disable_extension_diagnostics): Save
	warn_overlength_strings.
	(restore_extension_diagnostics): Restore warn_overlength_strings.
gcc/testsuite
	* gcc.dg/Woverlength-strings-pedantic-c89-ext.c: New file.
	* gcc.dg/Woverlength-strings-pedantic-c90-ext.c: New file.
	* gcc.dg/Woverlength-strings-pedantic-c99-ext.c: New file.

From-SVN: r170947