re PR libstdc++/41267 (vector<>::resize() from an empty vector calls memmove for 0 bytes (twice), wasting a lot of cpu time in a production PowerDNS)

2009-09-06  Paolo Carlini  <paolo.carlini@oracle.com>

	PR libstdc++/41267
	* include/bits/stl_algobase.h (__copy_move::__copy_m,
	__copy_move_backward::__copy_move_b): Don't call __builtin_memmove
	with a null third argument.

From-SVN: r151459