re PR c++/52718 (-Wzero-as-null-pointer-constant: misleading location for 0 as default argument)

/cp
2012-03-29  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/52718
	* decl.c (check_default_argument): With -Wzero-as-null-pointer-constant
	warn for a zero as null pointer constant default argument.

/testsuite
2012-03-29  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/52718
	* g++.dg/warn/Wzero-as-null-pointer-constant-5.C: New.

From-SVN: r185983